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/mtd/altera_qspi.c b/drivers/mtd/altera_qspi.c
index 1d32feb..6896351 100644
--- a/drivers/mtd/altera_qspi.c
+++ b/drivers/mtd/altera_qspi.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <fdt_support.h>
 #include <flash.h>
+#include <log.h>
 #include <mtd.h>
 #include <asm/io.h>