usb: phy: qmp: add support for runtime suspend

Adds a differentiation between runtime suspend and cable
disconnect suspend flows in order to support them both.

Change-Id: Ie5169b61c9a6eeb6513f7fb047ab7e8a6256f572
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>