ALSA: asihpi: fix spellint typo in comments

Change the comment typo: "ununsed" -> "unused".
Signed-off-by: Wang Qing <wangqing@vivo.com>
Link: https://lore.kernel.org/r/1600329372-2266-1-git-send-email-wangqing@vivo.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/asihpi/hpios.h

@@ -67,7 +67,7 @@ struct hpi_ioctl_linux {
 };
 
 /* Conflict?: H is already used by a number of drivers hid, bluetooth hci,
-   and some sound drivers sb16, hdsp, emu10k. AFAIK 0xFC is ununsed command
+   and some sound drivers sb16, hdsp, emu10k. AFAIK 0xFC is unused command
 */
 #define HPI_IOCTL_LINUX _IOWR('H', 0xFC, struct hpi_ioctl_linux)