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/lib/bootm.c b/arch/powerpc/lib/bootm.c
index a9bcb66..cd92db0 100644
--- a/arch/powerpc/lib/bootm.c
+++ b/arch/powerpc/lib/bootm.c
@@ -13,6 +13,7 @@
 #include <env.h>
 #include <init.h>
 #include <lmb.h>
+#include <log.h>
 #include <watchdog.h>
 #include <command.h>
 #include <image.h>
diff --git a/arch/powerpc/lib/extable.c b/arch/powerpc/lib/extable.c
index 683fd53..7e9d4f2 100644
--- a/arch/powerpc/lib/extable.c
+++ b/arch/powerpc/lib/extable.c
@@ -6,6 +6,7 @@
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  */
 #include <common.h>
+#include <log.h>
 
 /*
  * The exception table consists of pairs of addresses: the first is the
diff --git a/arch/powerpc/lib/spl.c b/arch/powerpc/lib/spl.c
index d90a6e2..d4a6057 100644
--- a/arch/powerpc/lib/spl.c
+++ b/arch/powerpc/lib/spl.c
@@ -4,6 +4,7 @@
  */
 #include <common.h>
 #include <config.h>
+#include <log.h>
 #include <spl.h>
 #include <image.h>
 #include <linux/compiler.h>