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>
diff --git a/arch/m68k/math-emu/fp_log.c b/arch/m68k/math-emu/fp_log.c
index 3384a52..0663067 100644
--- a/arch/m68k/math-emu/fp_log.c
+++ b/arch/m68k/math-emu/fp_log.c
@@ -50,7 +50,7 @@
 	 * sqrt(m*2^e) =
 	 *		 sqrt(2*m) * 2^(p)	, if e = 2*p + 1
 	 *
-	 * So we use the last bit of the exponent to decide wether to
+	 * So we use the last bit of the exponent to decide whether to
 	 * use the m or 2*m.
 	 *
 	 * Since only the fractional part of the mantissa is stored and