trivial: fix typo "varaible" -> "variable"

This patch was created by

	git grep -l '[vV]araible' | xargs -r -t perl -p -i -e 's/\b([Vv]ar)ai(bles?)\b/$1ia$2/g'
Signed-off-by: Uwe Kleine-Koenig <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/input/mouse/gpio_mouse.c

@@ -18,7 +18,7 @@
 
 /*
  * Timer function which is run every scan_ms ms when the device is opened.
- * The dev input varaible is set to the the input_dev pointer.
+ * The dev input variable is set to the the input_dev pointer.
  */
 static void gpio_mouse_scan(struct input_polled_dev *dev)
 {

drivers/net/skfp/h/hwmtm.h

@@ -145,7 +145,7 @@ struct hw_modul {
 	int	leave_isr ;		/* leave fddi_isr immedeately if set */
 	int	isr_flag ;		/* set, when HWM is entered from isr */
 	/*
-	 * varaibles for the current transmit frame
+	 * variables for the current transmit frame
 	 */
 	struct s_smt_tx_queue *tx_p ;	/* pointer to the transmit queue */
 	u_long	tx_descr ;		/* tx descriptor for FORMAC+ */

drivers/net/wan/farsync.c

@@ -69,7 +69,7 @@ MODULE_LICENSE("GPL");
 #endif
 
 /*
- * Modules parameters and associated varaibles
+ * Modules parameters and associated variables
  */
 static int fst_txq_low = FST_LOW_WATER_MARK;
 static int fst_txq_high = FST_HIGH_WATER_MARK;