wireguard: main: rename 'mod_init' & 'mod_exit' functions to be module-specific

Rename module_init & module_exit functions that are named
"mod_init" and "mod_exit" so that they are unique in both the
System.map file and in initcall_debug output instead of showing
up as almost anonymous "mod_init".

This is helpful for debugging and in determining how long certain
module_init calls take to execute.

Signed-off-by: Randy Dunlap <[e-mail]>
Signed-off-by: Jason A. Donenfeld <[e-mail]>
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/wireguard/main.c

···
 #include <linux/genetlink.h>
 #include <net/rtnetlink.h>
 
-static int __init mod_init(void)
+static int __init wg_mod_init(void)
 {
 	int ret;
 
···
 	return ret;
 }
 
-static void __exit mod_exit(void)
+static void __exit wg_mod_exit(void)
 {
 	wg_genetlink_uninit();
 	wg_device_uninit();
···
 	wg_allowedips_slab_uninit();
 }
 
-module_init(mod_init);
-module_exit(mod_exit);
+module_init(wg_mod_init);
+module_exit(wg_mod_exit);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("WireGuard secure network tunnel");
 MODULE_AUTHOR("Jason A. Donenfeld <[e-mail]>");