Merge tag 'rpi-next-2020.04' of https://gitlab.denx.de/u-boot/custodians/u-boot-raspberrypi

- DFU support file operations lager then the default max size
- add dfu support to dwc2 for bcm2835
- enable DFU for RPi4
- Fix RPi4 memory map to include the genet device
- add driver for the genet ethernet device
- enable network support in RPi4 config

include/configs/rpi.h

@@ -74,6 +74,25 @@
 #define CONFIG_TFTP_TSIZE
 #endif
 
+/* DFU over USB/UDC */
+#ifdef CONFIG_CMD_DFU
+#define CONFIG_SYS_DFU_DATA_BUF_SIZE	SZ_1M
+#define CONFIG_SYS_DFU_MAX_FILE_SIZE	SZ_2M
+
+#ifdef CONFIG_ARM64
+#define KERNEL_FILENAME		"Image"
+#else
+#define KERNEL_FILENAME		"zImage"
+#endif
+
+#define ENV_DFU_SETTINGS \
+	"dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;" \
+		      "config.txt fat 0 1;" \
+		      KERNEL_FILENAME " fat 0 1\0"
+#else
+#define ENV_DFU_SETTINGS ""
+#endif
+
 /* Console configuration */
 #define CONFIG_SYS_CBSIZE		1024
 
@@ -188,6 +207,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
 	ENV_DEVICE_SETTINGS \
+	ENV_DFU_SETTINGS \
 	ENV_MEM_LAYOUT_SETTINGS \
 	BOOTENV