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/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c
index 98f2c76..c4137de 100644
--- a/arch/riscv/lib/bootm.c
+++ b/arch/riscv/lib/bootm.c
@@ -12,6 +12,7 @@
 #include <dm.h>
 #include <fdt_support.h>
 #include <hang.h>
+#include <log.h>
 #include <dm/root.h>
 #include <image.h>
 #include <asm/byteorder.h>