ALSA: firewire: Simplify with str_on_off()

Use the standard helper str_on_off() to simplify the code.
Only code refactoring, no behavior change.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://patch.msgid.link/20250107155641.4435-6-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: tiwai

sound/firewire/fireface/ff-protocol-former.c

@@ -135,13 +135,13 @@ static void dump_clock_config(struct snd_ff *ff, struct snd_info_buffer *buffer)
 
 	snd_iprintf(buffer, "Output S/PDIF format: %s (Emphasis: %s)\n",
 		    (data & 0x00000020) ? "Professional" : "Consumer",
-		    (data & 0x00000040) ? "on" : "off");
+		    str_on_off(data & 0x00000040));
 
 	snd_iprintf(buffer, "Optical output interface format: %s\n",
 		    (data & 0x00000100) ? "S/PDIF" : "ADAT");
 
 	snd_iprintf(buffer, "Word output single speed: %s\n",
-		    (data & 0x00002000) ? "on" : "off");
+		    str_on_off(data & 0x00002000));
 
 	snd_iprintf(buffer, "S/PDIF input interface: %s\n",
 		    (data & 0x00000200) ? "Optical" : "Coaxial");