usb: phy: qusb2: Enable phy auto-resume

phy auto-resume allows phy to automatically drive
bus resume right after device driving bus resume for
at least 1ms due to remote wake up, before host XHCI
driver gets a chance to drive bus resume.

Change-Id: I6ea326b0864f46dd5e438f050950b8ee721726e5
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>