fix(xilinx): add headers to resolve compile time issue

Add common/debug.h and libfdt.h files to the common file
for XILINX_OF_BOARD_DTB_ADDR configuration.

Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
Change-Id: I577cc018eda34e186e48594a62c54eb55f11bbd3
1 file changed