arm: nexell: Remove <common.h> and add needed includes

Remove <common.h> from all mach-nexell files and when needed add missing
include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-nexell/clock.c b/arch/arm/mach-nexell/clock.c
index 59ffa26..3082f60 100644
--- a/arch/arm/mach-nexell/clock.c
+++ b/arch/arm/mach-nexell/clock.c
@@ -4,8 +4,8 @@
  * Hyunseok, Jung <hsjung@nexell.co.kr>
  */
 
-#include <common.h>
 #include <command.h>
+#include <vsprintf.h>
 #include <linux/err.h>
 #include <asm/io.h>
 #include <asm/arch/nexell.h>