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/x86/cpu/quark/dram.c b/arch/x86/cpu/quark/dram.c
index 30f4755..7293713 100644
--- a/arch/x86/cpu/quark/dram.c
+++ b/arch/x86/cpu/quark/dram.c
@@ -8,6 +8,7 @@
 #include <errno.h>
 #include <fdtdec.h>
 #include <init.h>
+#include <log.h>
 #include <malloc.h>
 #include <asm/cache.h>
 #include <asm/mrccache.h>