[RISCV] Fix capitalization of CHECK prefix in riscv-target-features.c. NFC

Author: topperc

clang/test/Preprocessor/riscv-target-features.c

@@ -1764,11 +1764,11 @@
 
 // RUN: %clang --target=riscv32 -menable-experimental-extensions \
 // RUN:   -march=rv32i_zve32x_zvqdotq0p0 -E -dM %s \
-// RUN:   -o - | FileCheck --check-prefix=CHECK-ZVqdotq-EXT %s
+// RUN:   -o - | FileCheck --check-prefix=CHECK-ZVQDOTQ-EXT %s
 // RUN: %clang --target=riscv64 -menable-experimental-extensions \
 // RUN:   -march=rv64i_zve32x_zvqdotq0p0 -E -dM %s \
-// RUN:   -o - | FileCheck --check-prefix=CHECK-ZVqdotq-EXT %s
-// CHECK-ZVqdotq-EXT: __riscv_zvqdotq 0{{$}}
+// RUN:   -o - | FileCheck --check-prefix=CHECK-ZVQDOTQ-EXT %s
+// CHECK-ZVQDOTQ-EXT: __riscv_zvqdotq 0{{$}}
 
 // RUN: %clang -target riscv32 -menable-experimental-extensions \
 // RUN:   -march=rv32izicfiss1p0 -E -dM %s \