sb/intel/bd82x6x: Add four new USB currents

Found by inteltool on HP Pro 3500 Series running vendor firmware version
8.14 Rev.A.

Change-Id: I156787e533c2605e7440548a2d3bf711bb1af5d7
Signed-off-by: Joel Linn <jl@conductive.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81427
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/intel/bd82x6x/early_usb.c

@@ -18,7 +18,8 @@ void early_usb_init(const struct southbridge_usb_port *portmap)
 	};
 	const u32 currents[] = { USBIR_TXRX_GAIN_MOBILE_LOW, USBIR_TXRX_GAIN_DEFAULT,
 				 USBIR_TXRX_GAIN_HIGH, 0x20000f51, 0x2000094a, 0x2000035f,
-				 USBIR_TXRX_GAIN_DESKTOP_LOW, 0x20000357, 0x20000353 };
+				 USBIR_TXRX_GAIN_DESKTOP_LOW, 0x20000357, 0x20000353,
+				 0x20000253, 0x20000053, 0x2000055f, 0x20000f5f};
 	int i;
 
 	/* Unlock registers.  */