Merge tag 'arc-updates-for-2018.09' of git://git.denx.de/u-boot-arc

Minor changes for ARC

1. Fix CPU clock value in HSDK's .dts so time is counted properly.
2. Enable bootelf command on EMDK

arch/arc/dts/hsdk.dts

@@ -20,7 +20,7 @@
 		core_clk: core_clk {
 			#clock-cells = <0>;
 			compatible = "fixed-clock";
-			clock-frequency = <1000000000>;
+			clock-frequency = <500000000>;
 			u-boot,dm-pre-reloc;
 		};
 	};

configs/emdk_defconfig

@@ -9,7 +9,6 @@ CONFIG_VERSION_VARIABLE=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="emdk# "
 # CONFIG_CMD_BOOTD is not set
-# CONFIG_CMD_ELF is not set
 # CONFIG_CMD_XIMG is not set
 CONFIG_CMD_MMC=y
 CONFIG_CMD_CACHE=y