Support using u-boot with Image format for raspberrypi3-64

For raspberrypi3-64 we need to use the Image or Image.gz format with u-boot
instead of the legacy uImage format. We also need to issue the 'booti' command
to boot the kernel instead of 'bootm'.

Signed-off-by: Paul Barker <pbarker@toganlabs.com>

recipes-bsp/rpi-u-boot-scr/files/boot.cmd

@@ -1,3 +0,0 @@
-fdt addr ${fdt_addr} && fdt get value bootargs /chosen bootargs
-fatload mmc 0:1 ${kernel_addr_r} uImage
-bootm ${kernel_addr_r} - ${fdt_addr}

recipes-bsp/rpi-u-boot-scr/files/boot.cmd.in

@@ -0,0 +1,3 @@
+fdt addr ${fdt_addr} && fdt get value bootargs /chosen bootargs
+fatload mmc 0:1 ${kernel_addr_r} @@KERNEL_IMAGETYPE@@
+@@KERNEL_BOOTCMD@@ ${kernel_addr_r} - ${fdt_addr}

recipes-bsp/rpi-u-boot-scr/rpi-u-boot-scr.bb

@@ -5,9 +5,12 @@ COMPATIBLE_MACHINE = "^rpi$"
 
 DEPENDS = "u-boot-mkimage-native"
 
-SRC_URI = "file://boot.cmd"
+SRC_URI = "file://boot.cmd.in"
 
 do_compile() {
+    sed -e 's/@@KERNEL_IMAGETYPE@@/${KERNEL_IMAGETYPE}/' \
+        -e 's/@@KERNEL_BOOTCMD@@/${KERNEL_BOOTCMD}/' \
+        "${WORKDIR}/boot.cmd.in" > "${WORKDIR}/boot.cmd"
     mkimage -A arm -T script -C none -n "Boot script" -d "${WORKDIR}/boot.cmd" boot.scr
 }