kselftest/arm64: Fix comment for ptrace_sve_get_fpsimd_data()

The comment for ptrace_sve_get_fpsimd_data() doesn't describe what the test
does at all, fix that.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220404090613.181272-2-broonie@kernel.orgSigned-off-by: Catalin Marinas <catalin.marinas@arm.com>

tools/testing/selftests/arm64/fp/sve-ptrace.c

@@ -395,7 +395,7 @@ static void ptrace_set_sve_get_sve_data(pid_t child,
 	free(write_buf);
 }
 
-/* Validate attempting to set SVE data and read SVE data */
+/* Validate attempting to set SVE data and read it via the FPSIMD regset */
 static void ptrace_set_sve_get_fpsimd_data(pid_t child,
 					   const struct vec_type *type,
 					   unsigned int vl)