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/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index 68cb3a0..fe3f5f5 100644
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -486,7 +486,7 @@
 **   This bit tells U2 to do R/M/W for partial cachelines. "Streaming"
 **   data can avoid this if the mapping covers full cache lines.
 ** o STOP_MOST is needed for atomicity across cachelines.
-**   Apperently only "some EISA devices" need this.
+**   Apparently only "some EISA devices" need this.
 **   Using CONFIG_ISA is hack. Only the IOA with EISA under it needs
 **   to use this hint iff the EISA devices needs this feature.
 **   According to the U2 ERS, STOP_MOST enabled pages hurt performance.