u_gralloc: Add QCOM gralloc support

Adds support for legacy QCOM grallocs that are a part of AOSP:
  hardware/qcom/display/*/libgralloc

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Tested-by: tarsin <yuanqingxiang233@163.com>
Acked-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25410>

src/util/u_gralloc/u_gralloc.c

@@ -28,6 +28,7 @@ static const struct u_grallocs {
 #ifdef USE_IMAPPER4_METADATA_API
    {.type = U_GRALLOC_TYPE_GRALLOC4, .create = u_gralloc_imapper_api_create},
 #endif /* USE_IMAPPER4_METADATA_API */
+   {.type = U_GRALLOC_TYPE_QCOM, .create = u_gralloc_qcom_create},
    {.type = U_GRALLOC_TYPE_FALLBACK, .create = u_gralloc_fallback_create},
 };