rockchip: rk3528-radxa-e20c: Enable USB gadget Kconfig options

Radxa E20C has a USB OTG Type-C port for Debug and Data.

Add required Kconfig options to use USB gadget features once pending
USB nodes finally lands in dts/upstream by a future sync.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

configs/radxa-e20c-rk3528_defconfig

@@ -20,6 +20,8 @@ CONFIG_CMD_GPT=y
 CONFIG_CMD_MISC=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_ROCKUSB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_RNG=y
 CONFIG_CMD_REGULATOR=y
@@ -28,6 +30,7 @@ CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigne
 CONFIG_BUTTON=y
 CONFIG_BUTTON_ADC=y
 CONFIG_BUTTON_GPIO=y
+# CONFIG_USB_FUNCTION_FASTBOOT is not set
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
@@ -43,6 +46,7 @@ CONFIG_DM_MDIO=y
 CONFIG_DWC_ETH_QOS=y
 CONFIG_DWC_ETH_QOS_ROCKCHIP=y
 CONFIG_PHY_ROCKCHIP_INNO_USB2=y
+CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY=y
 CONFIG_REGULATOR_PWM=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_PWM_ROCKCHIP=y
@@ -50,6 +54,12 @@ CONFIG_BAUDRATE=1500000
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYS_NS16550_MEM32=y
 CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_DWC3_GENERIC=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_USB_FUNCTION_ROCKUSB=y
 CONFIG_ERRNO_STR=y