CHROMIUM: tegra: clear SDHCI_QUIRK_NO_SDIO_IRQ quirk

CHROMIUM: tegra: clear SDHCI_QUIRK_NO_SDIO_IRQ quirk

Disabling SDIO interrupt polling. Polling uses CMD52 which
does not allow system to be idle for longer duration(LP2)

Change-Id: Ib7a0633b880a6070e88242647943f182c0c59d49
From: Rakesh Kumar <krakesh@nvidia.com>;

BUG=none
TEST=Built kernel and boot, system can enter LP2 when wifi enabled
Signed-off-by: Danny Huang <dahuang@nvidia.com>;

[Olof Johansson, 2010-12-17 18:30:56]

The workaround is, or was, there for a reason. Unfortunately I lack full history
for when it was added. There's a chance we will regress some usage by removing
it.

So, I would like to see a bit more testing before we pick this one up.

[Rakesh, 2010-12-22 06:43:41]

Broadcom recommends to remove this quirk. Can you please get history for this
quirk so that we can take this with broadcom? In fact, removing this quirk has
increased throughput on Android platform.

On 2010/12/17 18:30:56, Olof Johansson wrote:
> The workaround is, or was, there for a reason. Unfortunately I lack full
history
> for when it was added. There's a chance we will regress some usage by removing
> it.
> 
> So, I would like to see a bit more testing before we pick this one up.

[Olof Johansson, 2011-01-14 08:39:31]

This quirk is no longer used since the driver has been rewritten for .37.
Closing this CL.