LiveOPP: PLLDDR: don't show DDR_OPP

almost always shows incorrect OPP due to slow printing (in compare with OPP changing) by sprintf

Signed-off-by: Shilin Victor <chrono.monochrome@gmail.com>
compilation: fix 'make mrproper' errors

Signed-off-by: Shilin Victor <chrono.monochrome@gmail.com>