fix(mmc): resolve the build error

Adding the header file plat/common/common_def.h to
resolve the "SIZE_128" undeclared identifier error.

Change-Id: I399edf4248776f6dd9f93e000b8672cadc71509d
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
1 file changed