kselftest/arm64: fix array_size.cocci warning

Fix following coccicheck warning:

tools/testing/selftests/arm64/mte/check_mmap_options.c:64:24-25:
WARNING: Use ARRAY_SIZE
tools/testing/selftests/arm64/mte/check_mmap_options.c:66:20-21:
WARNING: Use ARRAY_SIZE
tools/testing/selftests/arm64/mte/check_mmap_options.c:135:25-26:
WARNING: Use ARRAY_SIZE
tools/testing/selftests/arm64/mte/check_mmap_options.c:96:25-26:
WARNING: Use ARRAY_SIZE
tools/testing/selftests/arm64/mte/check_mmap_options.c:190:24-25:
WARNING: Use ARRAY_SIZE
Signed-off-by: KaiLong Wang <wangkailong@jari.cn>
Link: https://lore.kernel.org/r/777ce8ba.12e.184705d4211.Coremail.wangkailong@jari.cnSigned-off-by: Will Deacon <will@kernel.org>

tools/testing/selftests/arm64/mte/check_mmap_options.c

@@ -61,9 +61,8 @@ static int check_anonymous_memory_mapping(int mem_type, int mode, int mapping, i
 {
 	char *ptr, *map_ptr;
 	int run, result, map_size;
-	int item = sizeof(sizes)/sizeof(int);
+	int item = ARRAY_SIZE(sizes);
 
-	item = sizeof(sizes)/sizeof(int);
 	mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
 	for (run = 0; run < item; run++) {
 		map_size = sizes[run] + OVERFLOW + UNDERFLOW;
@@ -93,7 +92,7 @@ static int check_file_memory_mapping(int mem_type, int mode, int mapping, int ta
 {
 	char *ptr, *map_ptr;
 	int run, fd, map_size;
-	int total = sizeof(sizes)/sizeof(int);
+	int total = ARRAY_SIZE(sizes);
 	int result = KSFT_PASS;
 
 	mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
@@ -132,7 +131,7 @@ static int check_clear_prot_mte_flag(int mem_type, int mode, int mapping)
 {
 	char *ptr, *map_ptr;
 	int run, prot_flag, result, fd, map_size;
-	int total = sizeof(sizes)/sizeof(int);
+	int total = ARRAY_SIZE(sizes);
 
 	prot_flag = PROT_READ | PROT_WRITE;
 	mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
@@ -187,7 +186,7 @@ static int check_clear_prot_mte_flag(int mem_type, int mode, int mapping)
 int main(int argc, char *argv[])
 {
 	int err;
-	int item = sizeof(sizes)/sizeof(int);
+	int item = ARRAY_SIZE(sizes);
 
 	err = mte_default_setup();
 	if (err)