sunxi: add support for Banana Pi M3

CPU	Allwinner A83t Octa-core Cortex A7 @ 1.2GHz
Memory  2Gb DDR3
Storage	SDcard, SATA (via USB), 8GB eMMC
Network	10/100/1000M ethernet, Ampak AP6212 wifi + BT
USB	2x USB 2.0

Flashing instructions:
 Standard sunxi SD card installation procedure - copy image to SD card,
 insert into SD card slot on the device and boot.

Signed-off-by: Zoltan HERPAI <[email protected]>

package/boot/uboot-sunxi/Makefile

@@ -294,6 +294,12 @@ define U-Boot/bananapi_m2_plus_h3
   BUILD_DEVICES:=sinovoip_bananapi-m2-plus
 endef
 
+define U-Boot/Sinovoip_BPI_M3
+  BUILD_SUBTARGET:=cortexa7
+  NAME:=Bananapi M3
+  BUILD_DEVICES:=sinovoip_bananapi-m3
+endef
+
 define U-Boot/sopine_baseboard
   BUILD_SUBTARGET:=cortexa53
   NAME:=Sopine Baseboard
@@ -378,6 +384,7 @@ UBOOT_TARGETS := \
 	orangepi_pc2 \
 	pangolin \
 	pine64_plus \
+	Sinovoip_BPI_M3 \
 	sopine_baseboard \
 	orangepi_zero_plus \
 	libretech_all_h3_cc_h5

target/linux/sunxi/image/cortexa7.mk

@@ -176,6 +176,15 @@ define Device/sinovoip_bananapi-m2-plus
 endef
 TARGET_DEVICES += sinovoip_bananapi-m2-plus
 
+define Device/sinovoip_bananapi-m3
+  DEVICE_VENDOR := Sinovoip
+  DEVICE_MODEL := Banana Pi M3
+  DEVICE_PACKAGES:=kmod-rtc-sunxi kmod-leds-gpio kmod-rtc-ac100 \
+	kmod-brcmfmac cypress-firmware-43430-sdio wpad-basic-mbedtls
+  SOC := sun8i-a83t
+endef
+TARGET_DEVICES += sinovoip_bananapi-m3
+
 define Device/xunlong_orangepi-one
   DEVICE_VENDOR := Xunlong
   DEVICE_MODEL := Orange Pi One