usb: phy: qusb: Don't held QUSB PHY into reset state

Currently QUSB PHY driver is keeping PHY into reset state and wait
for controller to bring it out of reset. Due to keeping PHY in reset
state (power down state) we are seeing no DP pulsing. Fix DP pulsing
issue by keeping QUSB PHY out of reset.

Change-Id: I7ffdf7c820455470fe7542fddd7f9453ff7cc320
Signed-off-by: Mayank Rana <mrana@codeaurora.org>