After the previous patch we can unexport intel_fb_check_stride(), which
isn't needed by intel_display.c.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210325214808.2071517-12-imre.deak@intel.com