Revert "mediatek: ensure stride meets Android requirement for YVU420"

This reverts commit 23d5fb3e838e89c06452715446d58b677ad3a9ac.

Reason for revert: breaks mtk boards with img gpu

Original change's description:
> mediatek: ensure stride meets Android requirement for YVU420
>
> Android YV12 requires "c_stride = ALIGN(stride/2, 16)", and is
reflected
> in drv_bo_from_format_and_padding.
>
> BUG=b:239243515
> TEST=build
>
> Change-Id: Ifb7641f5f818f96d40af460fc9d266cd9689f48a
> Reviewed-on:
https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3919605
> Auto-Submit: Yiwei Zhang <zzyiwei@chromium.org>
> Commit-Queue: Fei Shao <fshao@chromium.org>
> Reviewed-by: Ryan Neph <ryanneph@google.com>
> Tested-by: Yiwei Zhang <zzyiwei@chromium.org>

BUG=b:251373007
BUG=b:251376604
BUG=b:251377527
BUG=b:251372443
BUG=b:251035349
BUG=b:251721989
TEST=regression fixed

Change-Id: I00b8dddd40fe313cecf99468ef97cb4064322628
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3939484
Auto-Submit: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Ryan Neph <ryanneph@google.com>
Commit-Queue: Yiwei Zhang <zzyiwei@chromium.org>
Tested-by: Yiwei Zhang <zzyiwei@chromium.org>
diff --git a/mediatek.c b/mediatek.c
index 7f780f0..7956cdc 100644
--- a/mediatek.c
+++ b/mediatek.c
@@ -7,7 +7,6 @@
 #ifdef DRV_MEDIATEK
 
 // clang-format off
-#include <assert.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -87,33 +86,6 @@
 	return false;
 }
 
-static uint32_t get_format_horizontal_alignment(uint32_t format)
-{
-#ifdef DONT_USE_64_ALIGNMENT_FOR_VIDEO_BUFFERS
-	switch (format) {
-	case DRM_FORMAT_NV21:
-	case DRM_FORMAT_NV12:
-	case DRM_FORMAT_YUYV:
-		return 16;
-	case DRM_FORMAT_YVU420:
-	case DRM_FORMAT_YVU420_ANDROID:
-		/* see drv_bo_from_format_and_padding */
-		return 32;
-	default:
-		assert(!is_video_yuv_format(format));
-		break;
-	}
-#endif
-
-	/*
-	 * Since the ARM L1 cache line size is 64 bytes, align to that as a
-	 * performance optimization, except for video buffers on certain platforms,
-	 * these should only be accessed from the GPU and VCODEC subsystems (maybe
-	 * also MDP), so it's better to align to macroblocks.
-	 */
-	return 64;
-}
-
 static int mediatek_init(struct driver *drv)
 {
 	struct format_metadata metadata;
@@ -196,8 +168,19 @@
 		return -EINVAL;
 	}
 
+	/*
+	 * Since the ARM L1 cache line size is 64 bytes, align to that as a
+	 * performance optimization, except for video buffers on certain platforms,
+	 * these should only be accessed from the GPU and VCODEC subsystems (maybe
+	 * also MDP), so it's better to align to macroblocks.
+	 */
 	stride = drv_stride_from_format(format, width, 0);
-	stride = ALIGN(stride, get_format_horizontal_alignment(format));
+#ifdef DONT_USE_64_ALIGNMENT_FOR_VIDEO_BUFFERS
+	const uint32_t alignment = is_video_yuv_format(format) ? 16 : 64;
+	stride = ALIGN(stride, alignment);
+#else
+	stride = ALIGN(stride, 64);
+#endif
 
 	if ((bo->meta.use_flags & BO_USE_HW_VIDEO_ENCODER) || is_camera_preview) {
 		uint32_t aligned_height = ALIGN(height, 32);