usb: gadget: fsl_mxc_udc: Remove the driver

Since 5.10-rc1 i.MX is a devicetree-only platform, and this driver
was only used by the old non-DT i.MX devices.

Remove the driver as it has no users left.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20201210210413.15262-1-festevam@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/Kconfig

@@ -90,7 +90,7 @@ config USB_BCM63XX_UDC
 
 config USB_FSL_USB2
 	tristate "Freescale Highspeed USB DR Peripheral Controller"
-	depends on FSL_SOC || ARCH_MXC
+	depends on FSL_SOC
 	help
 	   Some of Freescale PowerPC and i.MX processors have a High Speed
 	   Dual-Role(DR) USB controller, which supports device mode.

drivers/usb/gadget/udc/Makefile

@@ -23,7 +23,6 @@ obj-$(CONFIG_USB_ATMEL_USBA)	+= atmel_usba_udc.o
 obj-$(CONFIG_USB_BCM63XX_UDC)	+= bcm63xx_udc.o
 obj-$(CONFIG_USB_FSL_USB2)	+= fsl_usb2_udc.o
 fsl_usb2_udc-y			:= fsl_udc_core.o
-fsl_usb2_udc-$(CONFIG_ARCH_MXC)	+= fsl_mxc_udc.o
 obj-$(CONFIG_USB_TEGRA_XUDC)	+= tegra-xudc.o
 obj-$(CONFIG_USB_M66592)	+= m66592-udc.o
 obj-$(CONFIG_USB_R8A66597)	+= r8a66597-udc.o