omap4-common: add missing checks for CONFIG_USB_OOBWAKE

Commit 0c451d2dc6cb4a17586e17d736370d66f1cc4a9e (ARM: OMAP: HS USB Host:
fix unbalanced pm calls) added calls to omap_hwmod_disable_ioring_wakeup
which should not be executed when CONFIG_USB_OOBWAKE is set.

Change-Id: I7f191f1b29fe9e2e08a42ec53fd3bd3e19f35019