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/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c
index f803d6f..1da2e92 100644
--- a/arch/arm/lib/cache-cp15.c
+++ b/arch/arm/lib/cache-cp15.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <cpu_func.h>
+#include <log.h>
 #include <asm/system.h>
 #include <asm/cache.h>
 #include <linux/compiler.h>