mips: bcm47xx: Enable USB power on Netgear WNDR3400v2

Eric has reported on OpenWrt's bug tracking system[1], that he's not
able to use USB devices on his WNDR3400v2 device after the boot, until
he turns on GPIO #21 manually through sysfs.

1. https://bugs.openwrt.org/index.php?do=details&task_id=2170

Cc: Rafał Miłecki <[email protected]>
Cc: Hauke Mehrtens <[email protected]>
Reported-by: Eric Bohlman <[email protected]>
Tested-by: Eric Bohlman <[email protected]>
Signed-off-by: Petr Štetiar <[email protected]>
Signed-off-by: Paul Burton <[email protected]>

Author: ynezz

arch/mips/bcm47xx/workarounds.c

@@ -24,6 +24,7 @@ void __init bcm47xx_workarounds(void)
 	case BCM47XX_BOARD_NETGEAR_WNR3500L:
 		bcm47xx_workarounds_enable_usb_power(12);
 		break;
+	case BCM47XX_BOARD_NETGEAR_WNDR3400V2:
 	case BCM47XX_BOARD_NETGEAR_WNDR3400_V3:
 		bcm47xx_workarounds_enable_usb_power(21);
 		break;