ALSA: portman2x4: fix repeated word 'if'

Correct duplicated word "if" to "if it".
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org
Link: https://lore.kernel.org/r/20201005191223.21514-1-rdunlap@infradead.orgSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/portman2x4.c

@@ -467,7 +467,7 @@ static int portman_probe(struct parport *p)
 	parport_write_control(p, 0);	/* Reset Strobe=0. */
 
 	/* Check if Tx circuitry is functioning properly.  If initialized 
-	 * unit TxEmpty is false, send out char and see if if goes true.
+	 * unit TxEmpty is false, send out char and see if it goes true.
 	 */
 	/* 8 */
 	parport_write_control(p, TXDATA0);	/* Tx channel 0, strobe off. */