ARC: HSDK: split HSDK and HSDK-4xD DTS

Split HSDK and HSDK-4xD device tree files so they can have
different model names.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/configs/hsdk_4xd_defconfig b/configs/hsdk_4xd_defconfig
index ccce534..64832ec 100644
--- a/configs/hsdk_4xd_defconfig
+++ b/configs/hsdk_4xd_defconfig
@@ -29,7 +29,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
-CONFIG_DEFAULT_DEVICE_TREE="hsdk"
+CONFIG_DEFAULT_DEVICE_TREE="hsdk-4xd"
 CONFIG_ENV_IS_IN_FAT=y
 CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"