usb: core: Power up SS phy before handling port suspend

If SS phy is power down writing to PORTSC of SS port
gets stuck because pipe clock is off. Fix this issue
by powering up SS phy perform port suspend and power
it down.

Change-Id: I8a13c79255d50b4ddf32537e14d61f1d7fea9822
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>