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/fpga/ivm_core.c b/drivers/fpga/ivm_core.c
index 6c6e5c3..adc6091 100644
--- a/drivers/fpga/ivm_core.c
+++ b/drivers/fpga/ivm_core.c
@@ -30,6 +30,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <linux/string.h>
 #include <malloc.h>
 #include <lattice.h>