build/arm64: Add rules for .dtbo files for dts overlays

We now create overlays as .dtbo files.

Signed-off-by: Khem Raj <[email protected]>

Author: kraj

arch/arm64/Makefile

@@ -134,6 +134,9 @@ zinstall install:
 %.dtb: scripts
 	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 
+%.dtbo: | scripts
+	$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $(boot)/dts/$@
+
 PHONY += dtbs dtbs_install
 
 dtbs: prepare scripts