common: Drop linux/printk.h from common header

This old patch was marked as deferred. Bring it back to life, to continue
towards the removal of common.h

Move this out of the common header and include it only where needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/samsung/common/exynos5-dt.c b/board/samsung/common/exynos5-dt.c
index 726b7f0..1e88a82 100644
--- a/board/samsung/common/exynos5-dt.c
+++ b/board/samsung/common/exynos5-dt.c
@@ -26,6 +26,7 @@
 #include <asm/arch/pinmux.h>
 #include <asm/arch/power.h>
 #include <asm/arch/sromc.h>
+#include <linux/printk.h>
 #include <power/pmic.h>
 #include <power/max77686_pmic.h>
 #include <power/regulator.h>
diff --git a/board/samsung/common/misc.c b/board/samsung/common/misc.c
index 5ffa216..cc114aa 100644
--- a/board/samsung/common/misc.c
+++ b/board/samsung/common/misc.c
@@ -10,6 +10,7 @@
 #include <libtizen.h>
 #include <asm/global_data.h>
 #include <linux/delay.h>
+#include <linux/printk.h>
 #include <samsung/misc.h>
 #include <errno.h>
 #include <version.h>