usb: gadget: HSIC wake from suspend workaround

For some MSM targets, there is an HW limitation that doesn't
allow wakeing up from USB bus suspend, when certain USB core
clocks are turned off as part of runtime suspend.
When this workaround is turned ON, the clocks that are mandatory
will not be disabled on runtime suspend.

Change-Id: Iab397c4f3b2918a5aa5eef7a60123bf7ede58d81
Signed-off-by: Amit Blay <ablay@codeaurora.org>