Revert of Tidy up SkNx_neon.

Revert of Tidy up SkNx_neon. (patchset #3 id:40001 of https://codereview.chromium.org/2196773002/ )

Reason for revert:
https://luci-milo.appspot.com/swarming/task/3055149a25621b10

Not Nexus 5 specific.   Reproduces on Pixel C with --gcc -t Debug -d arm_v7_neon.  Not sure about other configs yet.

Original issue's description:
> Tidy up SkNx_neon.
> 
> This takes advantage of the fact that all the compilers we use that
> support NEON implement it with their own vector extensions.  This means
> normal things like c = a + b work on the underlying vector types already.
> Odd instructions like min or saturated add need to stay intrinsics.
> 
> Also, rearrange functions to a more consistent order.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2196773002
> CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
> 
> Committed: https://skia.googlesource.com/skia/+/6ad22315eb6eacfcd35497cd118440a619d05b18

TBR=msarett@google.com,mtklein@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/7c0db75f40f588d91884dfbf3c207d040f3d802d

[mtklein, 2016-07-30 20:36:34]

The CQ bit was checked by mtklein@google.com

[mtklein, 2016-07-30 20:36:35]

Created Revert of Tidy up SkNx_neon.

[commit-bot: I haz the power, 2016-07-30 20:36:47]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-30 21:18:51]

Description was changed from

==========
Revert of Tidy up SkNx_neon. (patchset #3 id:40001 of
https://codereview.chromium.org/2196773002/ )

Reason for revert:
https://luci-milo.appspot.com/swarming/task/3055149a25621b10

Not Nexus 5 specific.   Reproduces on Pixel C with --gcc -t Debug -d
arm_v7_neon.  Not sure about other configs yet.

Original issue's description:
> Tidy up SkNx_neon.
> 
> This takes advantage of the fact that all the compilers we use that
> support NEON implement it with their own vector extensions.  This means
> normal things like c = a + b work on the underlying vector types already.
> Odd instructions like min or saturated add need to stay intrinsics.
> 
> Also, rearrange functions to a more consistent order.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2196773002
>
CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
> 
> Committed:
https://skia.googlesource.com/skia/+/6ad22315eb6eacfcd35497cd118440a619d05b18

TBR=msarett@google.com,mtklein@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:
==========

to

==========
Revert of Tidy up SkNx_neon. (patchset #3 id:40001 of
https://codereview.chromium.org/2196773002/ )

Reason for revert:
https://luci-milo.appspot.com/swarming/task/3055149a25621b10

Not Nexus 5 specific.   Reproduces on Pixel C with --gcc -t Debug -d
arm_v7_neon.  Not sure about other configs yet.

Original issue's description:
> Tidy up SkNx_neon.
> 
> This takes advantage of the fact that all the compilers we use that
> support NEON implement it with their own vector extensions.  This means
> normal things like c = a + b work on the underlying vector types already.
> Odd instructions like min or saturated add need to stay intrinsics.
> 
> Also, rearrange functions to a more consistent order.
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2196773002
>
CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
> 
> Committed:
https://skia.googlesource.com/skia/+/6ad22315eb6eacfcd35497cd118440a619d05b18

TBR=msarett@google.com,mtklein@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=skia:

Committed:
https://skia.googlesource.com/skia/+/7c0db75f40f588d91884dfbf3c207d040f3d802d
==========

[commit-bot: I haz the power, 2016-07-30 21:18:52]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/7c0db75f40f588d91884dfbf3c207d040f3d802d