nvdec: Check device codec capabilities before creating video parser

Submitted by Yeongjin Jeong

Link to original bug (#796736)

Description

Created attachment 372913
nvdec: Check device codec capabilities before creating video

Some NVIDIA video decoder not supports HEVC or VPX decoding.

So we need check device codec capabilities before creating video.

See https://developer.nvidia.com/nvidia-video-codec-sdk#NVDECFeatures

Patch 372913, "nvdec: Check device codec capabilities before creating video":
0001-nvdec-Check-device-codec-capabilities-before-creatin.patch