rock-pi-4: Add machine

Adds the machine definition for the Rock Pi 4 based around the RK3399
SoC.

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>

README

@@ -14,6 +14,7 @@ Dependencies:
 Status of supported boards:
 --------------------------
 	builds and boots gpt image:
+		rock-pi-4
 		tinker-rk3288
 		vyasa-rk3288
 		firefly-rk3288

conf/machine/rock-pi-4.conf

@@ -0,0 +1,28 @@
+# Copyright (C) 2020 Garmin Ltd. or its subsidaries
+# Released under the MIT license (see COPYING.MIT for the terms)
+
+#@TYPE: Machine
+#@NAME: Rock Pi 4 RK3288
+#@DESCRIPTION: Rock Pi 4 is a Raspberry Pi 4 Alternative based on Rockchip RK3399 Processor.
+
+require conf/machine/include/rk3399.inc
+
+KERNEL_DEVICETREE = "rockchip/rk3399-rock-pi-4.dtb"
+UBOOT_MACHINE = "rock-pi-4-rk3399_defconfig"
+
+WKS_FILE ?= "rock-pi-4.wks"
+IMAGE_FSTYPES += "wic wic.bmap"
+
+WKS_FILE_DEPENDS ?= " \
+    mtools-native \
+    dosfstools-native \
+    virtual/bootloader \
+    virtual/kernel \
+    "
+IMAGE_BOOT_FILES ?= "\
+    ${KERNEL_IMAGETYPE} \
+    "
+
+SERIAL_CONSOLES = "1500000;ttyS2"
+
+MACHINE_EXTRA_RRECOMMENDS += "kernel-modules"

wic/rock-pi-4.wks

@@ -0,0 +1,7 @@
+# Copyright (C) 2020 Garmin Ltd. or its subsidiaries
+# Released under the MIT license (see COPYING.MIT for the terms)
+
+include rk3399-boot.wks
+part / --align 131072 --source rootfs --fstype=ext4 --label root
+
+bootloader --ptable gpt --append="console=tty1 console=ttyS2,1500000n8 rw root=/dev/mmcblk1p7 rootfstype=ext4 init=/sbin/init"