SkNx Load/store: take any pointer.

bench/Sk4fBench.cpp

Index: bench/Sk4fBench.cpp
diff --git a/bench/Sk4fBench.cpp b/bench/Sk4fBench.cpp
index 1daa3f29736a09464e072a92d73ed204c1444da7..712a65776d8dc8d9667e447adac9c204d254236b 100644
--- a/bench/Sk4fBench.cpp
+++ b/bench/Sk4fBench.cpp
@@ -33,8 +33,8 @@ struct Sk4fBytesRoundtripBench : public Benchmark {
         for (int i = 0; i < loops; i++) {
             uint32_t color = lcg_rand(&seed),
                      back;
-            auto f = SkNx_cast<float>(Sk4b::Load((const uint8_t*)&color));
-            SkNx_cast<uint8_t>(f).store((uint8_t*)&back);
+            auto f = SkNx_cast<float>(Sk4b::Load(&color));
+            SkNx_cast<uint8_t>(f).store(&back);
             junk ^= back;
         }
         blackhole ^= junk;