plat-feroceon: rc74 merge clean up.

RC74 added link up callback in ISR, so removed that from alarm processing.

Also removed duplicate calls to mvOnuEponMacPcsDelaySet and
onuEponPonMngIntrRxCtrlFifoCleanup introduced by merge.

Change-Id: I4263ee1f56de7a671488ac1a96e860ddd8f00418
2 files changed