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/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index 886299a..492bf58 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -25,6 +25,7 @@
 #include <config.h>
 #include <common.h>
 #include <cpu_func.h>
+#include <log.h>
 #include <malloc.h>
 #include <memalign.h>
 #include <mmc.h>