drm: i915: use ARRAY_SIZE

Change sizeof(x) / sizeof(*x) to ARRAY_SIZE(x).

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index 6d553c2..d2d4e40 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1424,7 +1424,7 @@
 	int j, count = 0;
 	u64 tmp;
 
-	for (j = 0; j < sizeof(input_res_table) / sizeof(input_res_table[0]);
+	for (j = 0; j < ARRAY_SIZE(input_res_table);
 	     j++) {
 		struct input_res *input = &input_res_table[j];
 		unsigned int hactive_s = input->w;