usb3: a38x: add USB3 configuration register update for USB3 Device

	When USB3 device is enabled (SatR field 'usb3port0' or 'usb3port1' is 1)
	update configuration register (0x18420):
	- BIT0 (USB3 Device UTMI En)  -> 1 : USB3 Device enabled
	- BIT1 (USB3 Device UTMI Mux) -> 0 : UTMI2: USB3 Device is on UTMI2

Change-Id: I82f3d37596528749cd33ccceb84b9679b773dc2d
Signed-off-by: Bassel Saba <basselsa@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/20281
Tested-by: Star_Automation <star@marvell.com>
Reviewed-by: Omri Itach <omrii@marvell.com>
4 files changed