lib/igt_fb: Consolidate fb size calculation to one function

Eliminate the planar vs. packed size calculation differences and just
use one function for the entire thing.

v2: Rebase due to uint64_t size

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
1 file changed