typo fixes: aquire -> acquire

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index d6f6579..6734453 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2134,7 +2134,7 @@
 	mempool_t	*srb_mempool;
 
 	/* This spinlock is used to protect "io transactions", you must
-	 * aquire it before doing any IO to the card, eg with RD_REG*() and
+	 * acquire it before doing any IO to the card, eg with RD_REG*() and
 	 * WRT_REG*() for the duration of your entire commandtransaction.
 	 *
 	 * This spinlock is of lower priority than the io request lock.