cfg80211: declare MODULE_FIRMWARE for regulatory.db

Add MODULE_FIRMWARE declarations for regulatory.db and
regulatory.db.p7s such that userspace tooling can discover and include
these files.

Cc: [e-mail]
Signed-off-by: Dimitri John Ledkov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

net/wireless/reg.c

···
 	return 0;
 }
 
+MODULE_FIRMWARE("regulatory.db.p7s");
+
 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
 {
 	const struct firmware *sig;
···
 
 	release_firmware(fw);
 }
+
+MODULE_FIRMWARE("regulatory.db");
 
 static int query_regdb_file(const char *alpha2)
 {