Revert "lib: Update RWSEM to Linux 3.10"

This reverts commit 8e6c3c3b5479672d0f848068cba5681c29ebc03c.
msm_otg: hack to allow externally powered usb host mode
mach-msm: subsystem_restart: Fix CPU detection

Initialization function could not detect the correct CPU type
(apq8064). Therefore it could not register correctly subsystem
restart order for the panic_handler.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>