Revert "minigbm: align multi-planar formats to 16"

This reverts commit 6a8828492f4252a7c125a984823599bd65e3cb03.

Revert reason:  intel-vaapi-driver can relax height alignment

alignment is only enforced on tiled surfaced, after confirming
minigbm will provide linear surfaces, surfaces height needs
to be 4 bit aligned.

BUG=b/65272348
TEST="intel-vaapi-driver regular testing, VAVDA, VAVEA, VAJDA"
TEST="minigbm media tests within container"
TEST="tests mentioned in the bug"
CQ-DEPEND=CL:671650

Change-Id: Ifdccca9d7f85be0cbb504c0c0a2b4712aed99826
Signed-off-by: Daniel Charles <daniel.charles@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/685296
Tested-by: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>
diff --git a/i915.c b/i915.c
index 2d75793..70ecc5a 100644
--- a/i915.c
+++ b/i915.c
@@ -224,12 +224,6 @@
 		break;
 	}
 
-	/*
-	 * For multi-planar formats we must be aligned to 16
-	 */
-	if (bo->num_planes > 1)
-		vertical_alignment = MAX(vertical_alignment, 16);
-
 	*aligned_height = ALIGN(bo->height, vertical_alignment);
 	if (i915->gen > 3) {
 		*stride = ALIGN(*stride, horizontal_alignment);