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/arm/mach-s3c24xx/include/mach/dma.h

@@ -88,7 +88,7 @@ enum s3c2410_dma_state {
  *
  * This represents the state of the DMA engine, wrt to the loaded / running
  * transfers. Since we don't have any way of knowing exactly the state of
- * the DMA transfers, we need to know the state to make decisions on wether
+ * the DMA transfers, we need to know the state to make decisions on whether
  * we can
  *
  * S3C2410_DMA_NONE