usb: ehci-msm-hsic: Fix unbalanced clock warning

The HSIC controller may be in suspend state in which its clocks
are already disabled. Fix warning given by clock subsystem when
disabling the clocks a second time when the controller's platform
device is removed by first checking if the device is suspended.

Change-Id: Id6e6f01673b93a48de5e36afe3de44a5a4dc632e
Signed-off-by: Jack Pham <jackp@codeaurora.org>