powerpc/powernv: Remove duplicate header

Remove linux/printk.h which is included more than once.
Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/powernv/opal.c

@@ -26,7 +26,6 @@
 #include <linux/memblock.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
-#include <linux/printk.h>
 #include <linux/kmsg_dump.h>
 #include <linux/console.h>
 #include <linux/sched/debug.h>