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/drivers/ram/imxrt_sdram.c b/drivers/ram/imxrt_sdram.c
index d0a8884..6a15242 100644
--- a/drivers/ram/imxrt_sdram.c
+++ b/drivers/ram/imxrt_sdram.c
@@ -15,6 +15,7 @@
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/err.h>
+#include <linux/printk.h>
 
 /* SDRAM Command Code */
 #define SD_CC_ARD		0x0     /* Master Bus (AXI) command - Read */