Revert "USB: musb: blackfin: pm: make it work"

This reverts commit 1e393c6e.

Needed to properly merge the musb changes that are in the
usb-next branch into Linus's tree.

Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>