Revert of Disable NEON procs for box blur as it produces invalid results (patchset #1 id:1 of https://codereview.chromium.org/520963002/)

Reason for revert:
failing more GMs than expected.

Original issue's description:
> Disable NEON procs for box blur as it produces invalid results
>
> BUG=skia:2845
>
> Committed: https://skia.googlesource.com/skia/+/4a1764688c990fb926aaeab538497dad52768d99

R=senorblanco@google.com, mtklein@google.com
TBR=mtklein@google.com, senorblanco@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2845

Author: djsollen@google.com

Review URL: https://codereview.chromium.org/531023002
diff --git a/expectations/gm/ignored-tests.txt b/expectations/gm/ignored-tests.txt
index 569d866..3a3224d 100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -44,7 +44,3 @@
 
 # Added as part of https://codereview.chromium.org/466363009/
 fontcache
-
-# fix broken blurs on android (djsollen
-# http://skbug.com/2845
-imageblur2
diff --git a/src/opts/SkBlurImage_opts_arm.cpp b/src/opts/SkBlurImage_opts_arm.cpp
index fb61034..7462e6f 100644
--- a/src/opts/SkBlurImage_opts_arm.cpp
+++ b/src/opts/SkBlurImage_opts_arm.cpp
@@ -12,11 +12,10 @@
                                SkBoxBlurProc* boxBlurY,
                                SkBoxBlurProc* boxBlurXY,
                                SkBoxBlurProc* boxBlurYX) {
-    // Temporary workaround for http://skbug.com/2845
-    return false;
-
 #if SK_ARM_NEON_IS_NONE
     return false;
+#elif defined(SK_CPU_ARM64)  // Temporary fix for
+    return false;            // http://skbug.com/2845
 #else
 #if SK_ARM_NEON_IS_DYNAMIC
     if (!sk_cpu_arm_has_neon()) {