Stop using the PLD macro.

Every ARM processor we run on has the pld instruction.

Change-Id: I05512bf20a73590698c714d6921db4e44e971606
Replace "mips" with "mipmaps" since the MIPS gcc compiler defines mips to 1.

Change-Id: Ia48ffa714ff9e3a2e3b64ea1edd11ad0f6bf354a