radv: Fix off by one in MAX_VBS assert.

e.g. 0 + 32 <= 32 should be valid.

Fixes: f4e499ec791 "radv: add initial non-conformant radv vulkan driver"
Tested-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
1 file changed