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/cmd/usb_mass_storage.c b/cmd/usb_mass_storage.c
index 9c51ae0..a8ddeb4 100644
--- a/cmd/usb_mass_storage.c
+++ b/cmd/usb_mass_storage.c
@@ -18,6 +18,7 @@
 #include <usb_mass_storage.h>
 #include <watchdog.h>
 #include <linux/delay.h>
+#include <linux/printk.h>
 
 static int ums_read_sector(struct ums *ums_dev,
 			   ulong start, lbaint_t blkcnt, void *buf)