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/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
index b5fe828..24f599e 100644
--- a/drivers/mmc/s5p_sdhci.c
+++ b/drivers/mmc/s5p_sdhci.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <malloc.h>
 #include <sdhci.h>
 #include <fdtdec.h>