ralink: mt7621 add ECHI OCHI XCHI support

The usb stroage not working since updated 3.18. Porting from MTK's source code.

Signed-off-by: wengbj <fl.service@t-firefly.com>

SVN-Revision: 45021

target/linux/ramips/mt7621/config-3.18

@@ -166,6 +166,7 @@ CONFIG_POWER_RESET_GPIO=y
 CONFIG_POWER_SUPPLY=y
 # CONFIG_PREEMPT_RCU is not set
 CONFIG_RALINK=y
+CONFIG_RALINK_USBPHY=y
 # CONFIG_RALINK_WDT is not set
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_RESET_CONTROLLER=y
@@ -205,7 +206,12 @@ CONFIG_SYS_SUPPORTS_SCHED_SMT=y
 CONFIG_SYS_SUPPORTS_SMP=y
 CONFIG_TICK_CPU_ACCOUNTING=y
 CONFIG_TREE_RCU=y
+# CONFIG_USB_EHCI_HCD is not set
+CONFIG_USB_MT7621_XHCI_PLATFORM=y
+CONFIG_USB_PHY=y
 CONFIG_USB_SUPPORT=y
+# CONFIG_USB_UHCI_HCD is not set
+CONFIG_USB_XHCI_PLATFORM=y
 CONFIG_USE_OF=y
 CONFIG_WATCHDOG_CORE=y
 CONFIG_WEAK_ORDERING=y