ARM: dts: beagle-x15-common: Provide support for early-booted IPU1 & IPU2

Add support to enable the remoteproc late attach functionality of the IPU1
and IPU2 remote processors on all the AM57xx BeagleBoard-X15 boards. These
processors should have been booted earlier by either the U-Boot or SPL.
All the necessary node changes are applied by including the common
dra7-ipu-common-early-boot.dtsi file.

Signed-off-by: Suman Anna <s-anna@ti.com>

arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi

@@ -639,3 +639,5 @@
 	status = "okay";
 	memory-region = <&dsp2_memory_region>;
 };
+
+#include "dra7-ipu-common-early-boot.dtsi"