gallium: add missing PIPE_CAP_SURFACE_SAMPLE_COUNT default value

Fixes: 2710c40e3c8 ("gallium: Add new PIPE_CAP_SURFACE_SAMPLE_COUNT")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
1 file changed