venus: resolve YV12 AHB to VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM

venus: resolve YV12 AHB to VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM

YV12 is a 3-plane format with minigbm. This change mitigates the crash
of testGLViewLargerHeightDecodeAccuracy[4], and successfully creates the
host side image and imports the memory.

vk_format(1000156002) drm_fourcc(842094169)
offsets(0, 27648, 34560, 0)
strides(256, 128, 128, 0)
modifier(0)

Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Ryan Neph <ryanneph@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16913>