Fix build error when building with xserver built using meson
Meson build defines XV as: #define XV whereas autotools build defines it as: #define XV 1
This fix will allow xf86-video-fbdev to be compiled alongside with xserver built with meson.
Meson build defines XV as: #define XV whereas autotools build defines it as: #define XV 1
This fix will allow xf86-video-fbdev to be compiled alongside with xserver built with meson.