headers: remove sched.h from poll.h

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/media/video/cpia.c b/drivers/media/video/cpia.c
index 43ab0ad..2377313 100644
--- a/drivers/media/video/cpia.c
+++ b/drivers/media/video/cpia.c
@@ -31,6 +31,7 @@
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/vmalloc.h>
+#include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/proc_fs.h>
 #include <linux/ctype.h>