Revert "mfd: Add omap-usbhs runtime PM support"

Revert "mfd: Add omap-usbhs runtime PM support"

This reverts commit 4a8885a1509c33adb6a8ab799089e8529c9407f9.

Oops are produced during initialization of ehci and ohci
drivers. This is because the run time pm apis are used by
the driver but the corresponding hwmod structures and
initialization is not merged. hence revering  back the
commit id 4a8885a1509c33adb6a8ab799089e8529c9407f9

Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com>
Reported-by: Luciano Coelho <coelho@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>