common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-imx/cmd_dek.c b/arch/arm/mach-imx/cmd_dek.c
index 5f21d2b..49dd473 100644
--- a/arch/arm/mach-imx/cmd_dek.c
+++ b/arch/arm/mach-imx/cmd_dek.c
@@ -7,6 +7,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <log.h>
 #include <malloc.h>
 #include <asm/byteorder.h>
 #include <linux/compiler.h>