mb/asus/p8z77-v: Apply updated USB current map to sb devicetree

This map is found stored in plain text in vendor firmware image.

They will take effect when USB config is transitioned to southbridge
devicetree.

Change-Id: Iab0a225560856771407bb815ff4d8bc95d0f884f
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82755
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>

src/mainboard/asus/p8x7x-series/variants/p8z77-v/overridetree.cb

@@ -5,6 +5,22 @@ chip northbridge/intel/sandybridge
 		subsystemid 0x1043 0x84ca inherit
 		device ref peg11 on  end # PCIEX_16_2
 		chip southbridge/intel/bd82x6x
+			register "usb_port_config" = "{
+				{ 1, 2, 0 },
+				{ 1, 2, 0 },
+				{ 1, 2, 1 },
+				{ 1, 9, 1 },
+				{ 1, 9, 2 },
+				{ 1, 2, 2 },
+				{ 1, 2, 3 },
+				{ 1, 2, 3 },
+				{ 1, 2, 4 },
+				{ 1, 9, 4 },
+				{ 1, 2, 6 },
+				{ 1, 2, 5 },
+				{ 1, 2, 5 },
+				{ 1, 2, 6 }
+			}"
 			register "gen1_dec" = "0x000c0291"
 
 			device ref gbe on  end