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/power/mfd/fg_max77693.c b/drivers/power/mfd/fg_max77693.c
index 0de9ee7..983a6d4 100644
--- a/drivers/power/mfd/fg_max77693.c
+++ b/drivers/power/mfd/fg_max77693.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <power/pmic.h>
 #include <power/max77693_fg.h>
 #include <i2c.h>