[MIPS64] Enable the required flags for MIPS64 build.

Change-Id: Id8495cbb788048345a51c214e5049b3c590610c5
Signed-off-by: Raghu Gandham <raghu.gandham@imgtec.com>
Signed-off-by: Nikola Veljkovic <nikola.veljkovic@imgtec.com>
1 file changed