Add initial ppc64el support

Note that this does not include grub-ieee1275 support so the images will
not be bootable, but it's a first step and produces ISOs without error.

functions/configuration.sh

@@ -236,6 +236,10 @@ Prepare_config ()
 			LB_LINUX_FLAVOURS_WITH_ARCH="${LB_LINUX_FLAVOURS_WITH_ARCH:-powerpc64 powerpc}"
 			;;
 
+		ppc64el)
+			LB_LINUX_FLAVOURS_WITH_ARCH="${LB_LINUX_FLAVOURS_WITH_ARCH:-powerpc64le}"
+			;;
+
 		s390x)
 			LB_LINUX_FLAVOURS_WITH_ARCH="${LB_LINUX_FLAVOURS_WITH_ARCH:-s390x}"
 			;;

scripts/build/binary_linux-image

@@ -48,7 +48,7 @@ case "${LB_INITRAMFS}" in
 esac
 
 case "${LB_ARCHITECTURE}" in
-	powerpc)
+	powerpc|ppc64el)
 		LINUX="vmlinux"
 		;;
 

scripts/build/binary_rootfs

@@ -37,7 +37,7 @@ case "${LB_ARCHITECTURE}" in
 		LINUX="vmlinuz"
 		;;
 
-	powerpc)
+	powerpc|ppc64el)
 		LINUX="vmlinux"
 		;;
 esac