proc/cpuinfo: switch to ->read_iter

Implement ->read_iter so that the Android bionic test suite can use
this random proc file for its splice test case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/cpuinfo.c

@@ -19,7 +19,7 @@ static int cpuinfo_open(struct inode *inode, struct file *file)
 static const struct proc_ops cpuinfo_proc_ops = {
 	.proc_flags	= PROC_ENTRY_PERMANENT,
 	.proc_open	= cpuinfo_open,
-	.proc_read	= seq_read,
+	.proc_read_iter	= seq_read_iter,
 	.proc_lseek	= seq_lseek,
 	.proc_release	= seq_release,
 };