Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/sound/pci/au88x0/au88x0.h b/sound/pci/au88x0/au88x0.h
index ecb8f4d..02f6e08 100644
--- a/sound/pci/au88x0/au88x0.h
+++ b/sound/pci/au88x0/au88x0.h
@@ -104,7 +104,7 @@
 #define MIX_PLAYB(x) (vortex->mixplayb[x])
 #define MIX_SPDIF(x) (vortex->mixspdif[x])
 
-#define NR_WTPB 0x20		/* WT channels per eahc bank. */
+#define NR_WTPB 0x20		/* WT channels per each bank. */
 
 /* Structs */
 typedef struct {