PPC/s390: skip regress-2185 on ppc and s390

R=szuend@google.com, cbruni@chromium.org, jgruber@chromium.org

Bug: v8:7382,v8:7806,chromium:849293
Change-Id: I95874713038d14fa6ae294a23679dfaff70c65ba
Reviewed-on: https://chromium-review.googlesource.com/1089141Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#53585}

test/mjsunit/mjsunit.status

@@ -779,7 +779,7 @@
 }],  # variant == nooptimization and (arch == arm or arch == arm64) and simulator_run
 
 ##############################################################################
-['(arch == arm or arch == arm64) and simulator_run', {
+['(arch == arm or arch == arm64 or arch == ppc or arch == ppc64 or arch == s390 or arch == s390x) and simulator_run', {
   # TODO(szuend): Re-enable when pivot calculation is fixed:
   # https://crbug.com/v8/7795
   'regress/regress-2185': [SKIP],