Revert "omap4-common: only disable interrupt when port is suspending"

This reverts commit 15e7cb06029484be15dbe7d146aeef2b0fb79b26.
Revert "omap: serial: disable serial port irq during suspend"

This reverts commit d7234727a3993aac05201aaccae2de90fa3c2824.

Change-Id: I98ffebe3005831c2a92484bd6123cb1c0802d33b