firmware: fix typo on pr_info_once() when ignore_sysfs_fallback is used

When the sysctl knob is used ignore the fallback mechanism we pr_info_once()
to ensure its noted the knob was used. The print incorrectly states its a
debugfs knob, its a sysctl knob, so correct this typo.
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/firmware_loader/fallback.c

@@ -652,7 +652,7 @@ static bool fw_force_sysfs_fallback(unsigned int opt_flags)
 static bool fw_run_sysfs_fallback(unsigned int opt_flags)
 {
 	if (fw_fallback_config.ignore_sysfs_fallback) {
-		pr_info_once("Ignoring firmware sysfs fallback due to debugfs knob\n");
+		pr_info_once("Ignoring firmware sysfs fallback due to sysctl knob\n");
 		return false;
 	}