Snippets for xdrv:v4l 0.3.0 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/vryin8azb1np1dhnzcw60wvbldvbp77j-xf86-video-v4l-0.3.0.drv.

• /nix/store/z84pr4w6mkrgwphsqz9ira1yjhvsmggp-xorg-server-21.1.24-dev/include/xorg/xf86PciInfo.h:50:2: warning: #warning "xf86PciInfo.h is deprecated.  For greater compatibility, drivers should include necessary PCI IDs locally rather than relying on this file from xorg-server." [-Wcpp]
     50 | #warning "xf86PciInfo.h is deprecated.  For greater compatibility, drivers should include necessary PCI IDs locally rather than relying on this file from xorg-server."
        |  ^~~~~~~
  

• v4l.c:918:16: warning: passing argument 1 of 'sprintf' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    918 |     sprintf(enc->name,"%s-%s",norm,fixname(input));
        |             ~~~^~~~~~