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-omap2/omap3/am35x_musb.c b/arch/arm/mach-omap2/omap3/am35x_musb.c
index 5af6d28..026e5d2 100644
--- a/arch/arm/mach-omap2/omap3/am35x_musb.c
+++ b/arch/arm/mach-omap2/omap3/am35x_musb.c
@@ -9,6 +9,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <asm/io.h>
 #include <asm/arch/am35x_def.h>