Add kRG_88_SkColorType

Bug: skia:9121

Change-Id: Id2a12a5d607b84ce393d2b58233bf8e23f646059
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235797
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Mike Reed <reed@google.com>
diff --git a/src/gpu/GrDataUtils.cpp b/src/gpu/GrDataUtils.cpp
index c772f73..91956e3 100644
--- a/src/gpu/GrDataUtils.cpp
+++ b/src/gpu/GrDataUtils.cpp
@@ -203,7 +203,7 @@
             break;
         }
         case kRG_88_GrPixelConfig: {
-            uint16_t rg88 = (r << 8) | g;
+            uint16_t rg88 = (g << 8) | r;
 
             sk_memset16((uint16_t*) dest, rg88, width * height);
             break;