linux: add support of Synopsys ARCHS38-based boards

This patch introduces support of new boards with ARC HS38 cores.

ARC HS38 is a new generation of ARC cores which utilize ARCv2 ISA.
As with ARC770 we're addind support for 2 boards for now:

 [1] Synopsys SDP board (AXS103)
     This is the same base-board as in AXS101 but with
     FPGA-based CPU-tile where ARCHs38 core is implemented.

 [2] nSIM
     Again this is the same simulation engine but configured for
     new instruction set and features of new CPU.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Jo-Philipp Wich <jow@openwrt.org>
Cc: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 48740

target/linux/archs38/Makefile

@@ -0,0 +1,26 @@
+#
+# Copyright (C) 2016 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+ARCH:=arc
+CPU_TYPE:=archs
+BOARD:=archs38
+BOARDNAME:=Synopsys DesignWare ARC HS38
+MAINTAINER:=Alexey Brodkin <abrodkin@synopsys.com>
+SUBTARGETS:=generic
+
+KERNEL_PATCHVER:=4.4
+
+DEVICE_TYPE:=developerboard
+
+include $(INCLUDE_DIR)/target.mk
+
+define Target/Description
+	Synopsys DesignWare boards
+endef
+
+$(eval $(call BuildTarget))