Fix SUMOP and USMOP [_1x2]

Author: virginia-cangelosi

clang/include/clang/Basic/arm_sme.td

@@ -346,7 +346,7 @@ multiclass SUMOP4<string mode, string za, string t, string i, list<ImmCheck> che
                               "vidu", t, MergeNone, "aarch64_sme_sumop4" # mode # i # "_wide_1x1",
                               [IsStreaming, IsInOutZA],
                               checks>;
-  def _1x2 : SInst<"svmop4" # mode # "[_1x2]_" # za # "[_{d}_{3}]",
+  def _1x2 : SInst<"svmop4" # mode # "[_1x2]" # za # "[_{d}_{3}]",
                               "vid2.u", t, MergeNone, "aarch64_sme_sumop4" # mode # i # "_wide_1x2",
                               [IsStreaming, IsInOutZA],
                               checks>;
@@ -357,7 +357,7 @@ multiclass USMOP4<string mode, string za, string t, string i, list<ImmCheck> che
                               "vidx", t, MergeNone, "aarch64_sme_usmop4" # mode # i # "_wide_1x1",
                               [IsStreaming, IsInOutZA],
                               checks>;
-  def _1x2 : SInst<"svmop4" # mode # "[_1x2]_" # za # "[_{d}_{3}]",
+  def _1x2 : SInst<"svmop4" # mode # "[_1x2]" # za # "[_{d}_{3}]",
                               "vid2.x", t, MergeNone, "aarch64_sme_usmop4" # mode # i # "_wide_1x2",
                               [IsStreaming, IsInOutZA],
                               checks>;