[RISCV] Fix typo in RISCVISAInfoTest.cpp. NFC.

ExtsRV32G -> ExtsRV64G.

Author: tclin914

llvm/unittests/TargetParser/RISCVISAInfoTest.cpp

@@ -276,7 +276,7 @@ TEST(ParseArchString, AcceptsSupportedBaseISAsAndSetsXLenAndFLen) {
   EXPECT_TRUE(ExtsRV64G.at("zicsr") == (RISCVISAUtils::ExtensionVersion{2, 0}));
   EXPECT_TRUE(ExtsRV64G.at("zifencei") ==
               (RISCVISAUtils::ExtensionVersion{2, 0}));
-  EXPECT_TRUE(ExtsRV32G.at("zmmul") == (RISCVISAUtils::ExtensionVersion{1, 0}));
+  EXPECT_TRUE(ExtsRV64G.at("zmmul") == (RISCVISAUtils::ExtensionVersion{1, 0}));
   EXPECT_EQ(InfoRV64G.getXLen(), 64U);
   EXPECT_EQ(InfoRV64G.getFLen(), 64U);
   EXPECT_EQ(InfoRV64G.getMinVLen(), 0U);
@@ -297,7 +297,7 @@ TEST(ParseArchString, AcceptsSupportedBaseISAsAndSetsXLenAndFLen) {
   EXPECT_TRUE(ExtsRV64GCV.at("zicsr") == (RISCVISAUtils::ExtensionVersion{2, 0}));
   EXPECT_TRUE(ExtsRV64GCV.at("zifencei") ==
               (RISCVISAUtils::ExtensionVersion{2, 0}));
-  EXPECT_TRUE(ExtsRV32G.at("zmmul") == (RISCVISAUtils::ExtensionVersion{1, 0}));
+  EXPECT_TRUE(ExtsRV64G.at("zmmul") == (RISCVISAUtils::ExtensionVersion{1, 0}));
   EXPECT_TRUE(ExtsRV64GCV.at("v") == (RISCVISAUtils::ExtensionVersion{1, 0}));
   EXPECT_TRUE(ExtsRV64GCV.at("zve32x") == (RISCVISAUtils::ExtensionVersion{1, 0}));
   EXPECT_TRUE(ExtsRV64GCV.at("zve32f") == (RISCVISAUtils::ExtensionVersion{1, 0}));