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/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c
index 68bf93b..5907217 100644
--- a/drivers/i2c/s3c24x0_i2c.c
+++ b/drivers/i2c/s3c24x0_i2c.c
@@ -9,6 +9,7 @@
 #include <dm.h>
 #include <fdtdec.h>
 #if (defined CONFIG_EXYNOS4 || defined CONFIG_EXYNOS5)
+#include <log.h>
 #include <asm/arch/clk.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/pinmux.h>