virgl/gbm: Add support for GBM_FORMAT_ABGR2101010

Fixes SingleLayer_ColorTest_CpuWriteColorGpuRead_R10G10B10A2_UNORM
on chromebook with CTS 11_r4.

Signed-off-by: Nataraj Deshpande <nataraj.deshpande@intel.com>
Reviewed-by: Yiwei Zhang <zzyiwei@chromium.org>

src/vrend_winsys_gbm.c

@@ -101,6 +101,7 @@ static const struct format_conversion conversions[] = {
     { GBM_FORMAT_RGB565, VIRGL_FORMAT_B5G6R5_UNORM },
     { GBM_FORMAT_ABGR8888, VIRGL_FORMAT_B8G8R8A8_UNORM },
     { GBM_FORMAT_XBGR8888, VIRGL_FORMAT_B8G8R8X8_UNORM },
+    { GBM_FORMAT_ABGR2101010, VIRGL_FORMAT_R10G10B10A2_UNORM },
     { GBM_FORMAT_ABGR16161616F, VIRGL_FORMAT_R16G16B16A16_FLOAT },
     { GBM_FORMAT_NV12, VIRGL_FORMAT_NV12 },
     { GBM_FORMAT_ABGR8888, VIRGL_FORMAT_R8G8B8A8_UNORM},
@@ -184,6 +185,7 @@ static const struct planar_layout *layout_from_format(uint32_t format)
    case GBM_FORMAT_XRGB8888:
    case GBM_FORMAT_ABGR8888:
    case GBM_FORMAT_XBGR8888:
+   case GBM_FORMAT_ABGR2101010:
       return &packed_4bpp_layout;
    case GBM_FORMAT_ABGR16161616F:
       return &packed_8bpp_layout;