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/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index 31b6aa2..c4225b8 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -9,6 +9,7 @@
 #include <div64.h>
 #include <dm.h>
 #include <errno.h>
+#include <log.h>
 #include <time.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>