Add -Wall to compiler flags

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Fix some (most) of the errors reported by the compiler

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
drm_info: dump information about formats supported by planes

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Merge pull request #4 from lumag/wall

Add -Wall and fix respective warnings.