common: Move command functions out of common.h

Move these functions into the command.h header file which is a better fit.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

board/engicam/common/board.c

@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <env.h>
 #include <mmc.h>
 #include <asm/arch/sys_proto.h>

board/gdsys/a38x/keyprogram.c

@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <env.h>
 #include <tpm-v1.h>
 #include <malloc.h>

board/gdsys/p1022/controlcenterd-id.c

@@ -11,6 +11,7 @@
 #endif
 
 #include <common.h>
+#include <command.h>
 #include <dm.h>
 #include <env.h>
 #include <malloc.h>

board/grinn/liteboard/board.c

@@ -4,6 +4,7 @@
  * Copyright (C) 2016 Grinn
  */
 
+#include <command.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/imx-regs.h>

board/inversepath/usbarmory/usbarmory.c

@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/sys_proto.h>

board/samsung/common/misc.c

@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <env.h>
 #include <lcd.h>
 #include <libtizen.h>