drm/msm: De-open-code some CP_EVENT_WRITE

Replace some open coding to improve readability.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/499272/
Link: https://lore.kernel.org/r/20220821155441.1092134-1-robdclark@gmail.com
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 4d50110..c8ad8aec 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -146,7 +146,7 @@ static void a6xx_set_pagetable(struct a6xx_gpu *a6xx_gpu,
 	 */
 
 	OUT_PKT7(ring, CP_EVENT_WRITE, 1);
-	OUT_RING(ring, 0x31);
+	OUT_RING(ring, CACHE_INVALIDATE);
 
 	if (!sysprof) {
 		/*