drm/i915: Shrink per-platform watermark configuration

Use types of more appropriate size in struct
intel_watermark_params to save 512 bytes of .rodata.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/intel_drv.h

@@ -799,11 +799,11 @@ struct intel_plane {
 };
 
 struct intel_watermark_params {
-	unsigned long fifo_size;
-	unsigned long max_wm;
-	unsigned long default_wm;
-	unsigned long guard_size;
-	unsigned long cacheline_size;
+	u16 fifo_size;
+	u16 max_wm;
+	u8 default_wm;
+	u8 guard_size;
+	u8 cacheline_size;
 };
 
 struct cxsr_latency {

drivers/gpu/drm/i915/intel_pm.c

@@ -775,13 +775,13 @@ static bool g4x_check_srwm(struct drm_device *dev,
 		      display_wm, cursor_wm);
 
 	if (display_wm > display->max_wm) {
-		DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
+		DRM_DEBUG_KMS("display watermark is too large(%d/%u), disabling\n",
 			      display_wm, display->max_wm);
 		return false;
 	}
 
 	if (cursor_wm > cursor->max_wm) {
-		DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
+		DRM_DEBUG_KMS("cursor watermark is too large(%d/%u), disabling\n",
 			      cursor_wm, cursor->max_wm);
 		return false;
 	}