selftests: arm64: Use a define for the number of SVE ptrace tests to be run

Partly in preparation for future refactoring move from hard coding the
number of tests in main() to putting #define at the top of the source
instead.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210913125505.52619-2-broonie@kernel.orgSigned-off-by: Will Deacon <will@kernel.org>

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

@@ -19,6 +19,8 @@
 
 #include "../../kselftest.h"
 
+#define EXPECTED_TESTS 20
+
 /* <linux/elf.h> and <sys/auxv.h> don't like each other, so: */
 #ifndef NT_ARM_SVE
 #define NT_ARM_SVE 0x405
@@ -313,7 +315,7 @@ int main(void)
 	pid_t child;
 
 	ksft_print_header();
-	ksft_set_plan(20);
+	ksft_set_plan(EXPECTED_TESTS);
 
 	if (!(getauxval(AT_HWCAP) & HWCAP_SVE))
 		ksft_exit_skip("SVE not available\n");