proc: convert everything to "struct proc_ops"

The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in
seq_file.h.

Conversion rule is:

	llseek		=> proc_lseek
	unlocked_ioctl	=> proc_ioctl

	xxx		=> proc_xxx

	delete ".owner = THIS_MODULE" line

[akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c]
[sfr@canb.auug.org.au: fix kernel/sched/psi.c]
  Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au
Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/atm/mpoa_proc.c b/net/atm/mpoa_proc.c
index 46d6cd9..829db9e 100644
--- a/net/atm/mpoa_proc.c
+++ b/net/atm/mpoa_proc.c
@@ -53,15 +53,12 @@ static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
 
 static int parse_qos(const char *buff);
 
-/*
- *   Define allowed FILE OPERATIONS
- */
-static const struct file_operations mpc_file_operations = {
-	.open =		proc_mpc_open,
-	.read =		seq_read,
-	.llseek =	seq_lseek,
-	.write =	proc_mpc_write,
-	.release =	seq_release,
+static const struct proc_ops mpc_proc_ops = {
+	.proc_open	= proc_mpc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_write	= proc_mpc_write,
+	.proc_release	= seq_release,
 };
 
 /*
@@ -290,7 +287,7 @@ int mpc_proc_init(void)
 {
 	struct proc_dir_entry *p;
 
-	p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations);
+	p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_proc_ops);
 	if (!p) {
 		pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
 		return -ENOMEM;