Fix misc .c/.h comment typos

Fix various .c/.h typos in comments (no code changes).

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/include/linux/ixjuser.h b/include/linux/ixjuser.h
index fd1756d..88b4589 100644
--- a/include/linux/ixjuser.h
+++ b/include/linux/ixjuser.h
@@ -315,7 +315,7 @@
 * structures.  If the freq0 variable is non-zero, the tone table contents
 * for the tone_index are updated to the frequencies and gains defined.  It
 * should be noted that DTMF tones cannot be reassigned, so if DTMF tone
-* table indexs are used in a cadence the frequency and gain variables will
+* table indexes are used in a cadence the frequency and gain variables will
 * be ignored.
 *
 * If the array elements contain frequency parameters the driver will