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/powerpc/cpu/mpc85xx/mp.c b/arch/powerpc/cpu/mpc85xx/mp.c
index 0f8c8cd..28e1580 100644
--- a/arch/powerpc/cpu/mpc85xx/mp.c
+++ b/arch/powerpc/cpu/mpc85xx/mp.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <cpu_func.h>
 #include <env.h>
+#include <log.h>
 #include <asm/processor.h>
 #include <env.h>
 #include <ioports.h>