drm/i915: Use ARRAY_SIZE() instead of hand rolling it

A couple of hand rolled ARRAY_SIZE()s caught my eye. Get rid of them.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_sdvo.c

@@ -63,7 +63,7 @@ static const char *tv_format_names[] = {
 	"SECAM_60"
 };
 
-#define TV_FORMAT_NUM  (sizeof(tv_format_names) / sizeof(*tv_format_names))
+#define TV_FORMAT_NUM  ARRAY_SIZE(tv_format_names)
 
 struct intel_sdvo {
 	struct intel_encoder base;

drivers/gpu/drm/i915/intel_tv.c

@@ -1291,7 +1291,7 @@ static void intel_tv_find_better_format(struct drm_connector *connector)
 		return;
 
 
-	for (i = 0; i < sizeof(tv_modes) / sizeof(*tv_modes); i++) {
+	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
 		tv_mode = tv_modes + i;
 
 		if ((intel_tv->type == DRM_MODE_CONNECTOR_Component) ==

drivers/gpu/drm/i915/intel_uncore.c

@@ -52,8 +52,7 @@ static const char * const forcewake_domain_names[] = {
 const char *
 intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
 {
-	BUILD_BUG_ON((sizeof(forcewake_domain_names)/sizeof(const char *)) !=
-		     FW_DOMAIN_ID_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
 
 	if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
 		return forcewake_domain_names[id];