mips: bmips: add nb4-ser usb support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

arch/mips/dts/sfr,nb4-ser.dts

@@ -50,6 +50,10 @@
 	};
 };
 
+&ehci {
+	status = "okay";
+};
+
 &gpio0 {
 	status = "okay";
 };
@@ -83,6 +87,10 @@
 	};
 };
 
+&ohci {
+	status = "okay";
+};
+
 &pflash {
 	status = "okay";
 };
@@ -91,3 +99,7 @@
 	u-boot,dm-pre-reloc;
 	status = "okay";
 };
+
+&usbh {
+	status = "okay";
+};

configs/sfr_nb4-ser_ram_defconfig

@@ -25,6 +25,7 @@ CONFIG_CMD_LICENSE=y
 # CONFIG_CMD_CRC32 is not set
 CONFIG_CMD_MEMINFO=y
 # CONFIG_CMD_LOADS is not set
+CONFIG_CMD_USB=y
 # CONFIG_CMD_MISC is not set
 CONFIG_OF_EMBED=y
 # CONFIG_NET is not set
@@ -37,8 +38,16 @@ CONFIG_LED_GPIO=y
 CONFIG_MTD=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_CFI_FLASH=y
+CONFIG_PHY=y
+CONFIG_BCM6358_USBH_PHY=y
 CONFIG_DM_RESET=y
 CONFIG_RESET_BCM6345=y
 # CONFIG_SPL_SERIAL_PRESENT is not set
 CONFIG_DM_SERIAL=y
 CONFIG_BCM6345_SERIAL=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_GENERIC=y