Remove level=stride hack in virtio_gpu_bo_invalidate

Remove level=stride hack in virtio_gpu_bo_invalidate

The non-gbm path in virglrenderer does not need this hack

BUG=b:142364535
TEST=Run these CTS tests
	android.hardware.nativehardware.cts.AHardwareBufferNativeTests#SingleLayer_ColorTest_GpuColorOutputCpuRead_R8G8B8A8_UNORM
	android.hardware.nativehardware.cts.AHardwareBufferNativeTests#SingleLayer_ColorTest_GpuColorOutputCpuRead_R8G8B8X8_UNORM
	android.hardware.nativehardware.cts.AHardwareBufferNativeTests#SingleLayer_ColorTest_GpuColorOutputCpuRead_R5G6B5_UNORM

Change-Id: I672dcec7e3bb5d9e6841e6ea48f56f26a4130df2
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/2007028
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Woody Chow <woodychow@chromium.org>
Commit-Queue: Woody Chow <woodychow@chromium.org>