Enable dp4a: set to shipped-with-kill-switch

Bug: tint:1497
Change-Id: I778cd6754dbd7f65e8e135a7726b8a2a4a6889df
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/172580
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: David Neto <dneto@google.com>
diff --git a/src/tint/lang/wgsl/features/status.cc b/src/tint/lang/wgsl/features/status.cc
index 334c1b6..2f592a1 100644
--- a/src/tint/lang/wgsl/features/status.cc
+++ b/src/tint/lang/wgsl/features/status.cc
@@ -36,7 +36,6 @@
             ////////////////////////////////////////////////////////////////////
             // Experimental features
             ///////////////////////////////////////////////////////////////////
-        case LanguageFeature::kPacked4X8IntegerDotProduct:
         case LanguageFeature::kPointerCompositeAccess:
         case LanguageFeature::kReadonlyAndReadwriteStorageTextures:
             return FeatureStatus::kExperimental;
@@ -44,6 +43,7 @@
             ////////////////////////////////////////////////////////////////////
             // Enabled features
             ////////////////////////////////////////////////////////////////////
+        case LanguageFeature::kPacked4X8IntegerDotProduct:
         case LanguageFeature::kUnrestrictedPointerParameters:
             return FeatureStatus::kShippedWithKillswitch;