Fix misspellings of "whether" in comments.

"Whether" is misspelled in various comments across the tree; this
fixes them. No code changes.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/powerpc/platforms/cell/spider-pic.c

@@ -148,7 +148,7 @@ static int spider_set_irq_type(struct irq_data *d, unsigned int type)
 
 	/* Configure the source. One gross hack that was there before and
 	 * that I've kept around is the priority to the BE which I set to
-	 * be the same as the interrupt source number. I don't know wether
+	 * be the same as the interrupt source number. I don't know whether
 	 * that's supposed to make any kind of sense however, we'll have to
 	 * decide that, but for now, I'm not changing the behaviour.
 	 */
@@ -220,7 +220,7 @@ static void spider_irq_cascade(unsigned int irq, struct irq_desc *desc)
 /* For hooking up the cascace we have a problem. Our device-tree is
  * crap and we don't know on which BE iic interrupt we are hooked on at
  * least not the "standard" way. We can reconstitute it based on two
- * informations though: which BE node we are connected to and wether
+ * informations though: which BE node we are connected to and whether
  * we are connected to IOIF0 or IOIF1. Right now, we really only care
  * about the IBM cell blade and we know that its firmware gives us an
  * interrupt-map property which is pretty strange.
@@ -232,7 +232,7 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
 	int imaplen, intsize, unit;
 	struct device_node *iic;
 
-	/* First, we check wether we have a real "interrupts" in the device
+	/* First, we check whether we have a real "interrupts" in the device
 	 * tree in case the device-tree is ever fixed
 	 */
 	struct of_irq oirq;