PPC/s390: [wasm-simd] Move i64x2.bitmask out of post-mvp

Port acbdaa4c

Original Commit Message:

    Also remove some ifdefs since it is implemented on all architectures.

R=zhin@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I2ec501c15dda5a0aa970b8b7d18a995e60f71b60
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2624747Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72046}

src/compiler/backend/ppc/instruction-selector-ppc.cc

@@ -2387,6 +2387,7 @@ SIMD_BOOL_LIST(SIMD_VISIT_BOOL)
 SIMD_VISIT_BITMASK(I8x16BitMask)
 SIMD_VISIT_BITMASK(I16x8BitMask)
 SIMD_VISIT_BITMASK(I32x4BitMask)
+SIMD_VISIT_BITMASK(I64x2BitMask)
 #undef SIMD_VISIT_BITMASK
 
 #define SIMD_VISIT_PMIN_MAX(Type)                                           \

src/compiler/backend/s390/instruction-selector-s390.cc

@@ -2698,6 +2698,7 @@ SIMD_VISIT_QFMOP(F32x4Qfms)
 SIMD_VISIT_BITMASK(I8x16BitMask)
 SIMD_VISIT_BITMASK(I16x8BitMask)
 SIMD_VISIT_BITMASK(I32x4BitMask)
+SIMD_VISIT_BITMASK(I64x2BitMask)
 #undef SIMD_VISIT_BITMASK
 
 #define SIMD_VISIT_PMIN_MAX(Type)                                           \