rockchip: dts: rk3328: add fixed regulator node for xhci

The driver changes gpio to fixed regulator to control vbus, so add
fixed regulator node in DTS for xhci driver.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

configs/evb-rk3328_defconfig

@@ -31,12 +31,28 @@ CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYS_NS16550=y
 CONFIG_SYSRESET=y
 CONFIG_USB=y
-CONFIG_USB_XHCI_HCD=y
-CONFIG_USB_XHCI_DWC3=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_GENERIC=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_GENERIC=y
+CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
+CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_RK=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_USB_GADGET_DUALSPEED=y
+CONFIG_USB_GADGET_DWC2_OTG=y
+CONFIG_USB_FUNCTION_FASTBOOT=y
+CONFIG_G_DNL_MANUFACTURER="Rockchip"
+CONFIG_G_DNL_VENDOR_NUM=0x2207
+CONFIG_G_DNL_PRODUCT_NUM=0x330a
+CONFIG_FASTBOOT=y
+CONFIG_CMD_FASTBOOT=y
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=1
+CONFIG_FASTBOOT_BUF_ADDR=0x00800800
+CONFIG_FASTBOOT_BUF_SIZE=0x08000000
 CONFIG_USE_TINY_PRINTF=y
 CONFIG_ERRNO_STR=y