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/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c b/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
index 516292a..4ad7807 100644
--- a/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
+++ b/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
@@ -12,6 +12,7 @@
 #include <asm/arch-rockchip/grf_rk3399.h>
 #include <asm/arch-rockchip/hardware.h>
 #include <asm/arch-rockchip/misc.h>
+#include <linux/printk.h>
 #include <power/regulator.h>
 
 #define GRF_IO_VSEL_BT565_SHIFT 0