arm: Don't include common.h in header files

It is bad practice to include common.h in other header files since it can
bring in any number of superfluous definitions. It implies that some C
files don't include it and thus may be missing CONFIG options that are set
up by that file. The C files should include these themselves.

Update some header files in arch/arm to drop this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-imx/ddrmc-vf610.c b/arch/arm/mach-imx/ddrmc-vf610.c
index 461fba4..f25119a 100644
--- a/arch/arm/mach-imx/ddrmc-vf610.c
+++ b/arch/arm/mach-imx/ddrmc-vf610.c
@@ -6,6 +6,7 @@
  * Copyright 2013 Freescale Semiconductor, Inc.
  */
 
+#include <common.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/iomux-vf610.h>
diff --git a/arch/arm/mach-imx/mx7ulp/soc.c b/arch/arm/mach-imx/mx7ulp/soc.c
index 0d39dab..518d77a 100644
--- a/arch/arm/mach-imx/mx7ulp/soc.c
+++ b/arch/arm/mach-imx/mx7ulp/soc.c
@@ -2,6 +2,8 @@
 /*
  * Copyright (C) 2016 Freescale Semiconductor, Inc.
  */
+
+#include <common.h>
 #include <cpu_func.h>
 #include <init.h>
 #include <asm/io.h>
diff --git a/arch/arm/mach-imx/sata.c b/arch/arm/mach-imx/sata.c
index b9f6309..c4599aa 100644
--- a/arch/arm/mach-imx/sata.c
+++ b/arch/arm/mach-imx/sata.c
@@ -7,6 +7,7 @@
 #include <asm/arch/iomux.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
 #include <asm/arch/sys_proto.h>
 
 int setup_sata(void)