Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/net/wimax.h b/include/net/wimax.h
index 3461aa1..c799ba7 100644
--- a/include/net/wimax.h
+++ b/include/net/wimax.h
@@ -286,7 +286,7 @@
  *     does not disconnect the device from the bus and return 0.
  *     If that fails, it should resort to some sort of cold or bus
  *     reset (even if it implies a bus disconnection and device
- *     dissapearance). In that case, -ENODEV should be returned to
+ *     disappearance). In that case, -ENODEV should be returned to
  *     indicate the device is gone.
  *     This operation has to be synchronous, and return only when the
  *     reset is complete. In case of having had to resort to bus/cold