[U-Boot] [PATCH v2 4/9] arc: use generic dtb rule with CONFIG_DEFAULT_DEVICE_TREE

[Thomas Chou]

Use generic dtb rule with CONFIG_DEFAULT_DEVICE_TREE, so that
there is no need to list all the dtb for different targets/boards
in Makefile.

Support list of Device Tree in DEFAULT_DEVICE_TREE. Each DT in the
list will be compiled. The first will be used as default to ship.

Signed-off-by: Thomas Chou <thomas at wytron.com.tw>
Cc: Alexey Brodkin <alexey.brodkin at synopsys.com>
---
v2
  add list support as Simon suggested.

 arch/arc/dts/Makefile | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/arc/dts/Makefile b/arch/arc/dts/Makefile
index d4772ec..eaeb26f 100644
--- a/arch/arc/dts/Makefile
+++ b/arch/arc/dts/Makefile
@@ -2,9 +2,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-dtb-$(CONFIG_TARGET_AXS101) +=  axs10x.dtb
-dtb-$(CONFIG_TARGET_ARCANGEL4) +=  arcangel4.dtb
-dtb-$(CONFIG_TARGET_TB100) +=  abilis_tb100.dtb
+DEVICE_TREE_LIST ?= $(subst $\",,$(CONFIG_DEFAULT_DEVICE_TREE))
+dtb-y += $(DEVICE_TREE_LIST:=.dtb)
 
 targets += $(dtb-y)
 
-- 
2.5.0