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/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
index caf31ef..0ee5074 100644
--- a/drivers/spi/fsl_qspi.c
+++ b/drivers/spi/fsl_qspi.c
@@ -24,6 +24,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <asm/io.h>
 #include <linux/libfdt.h>
 #include <linux/sizes.h>