devtools: enable codespell in checkpatch

devtools: enable codespell in checkpatch

Enable codespell by default.
codespell is a feature by checkpatch.pl that
checks for common spelling mistakes in patches.

This feature is disabled by default. To enable it one must add
the '--codespell' flag to the $options variable in
checkpatches.sh. With this change codespell is enabled by default.
The user can decide to turn off codespell from a one of the config
files read by checkpatches.sh.

Signed-off-by: Michael Santana <msantana@redhat.com>
Reviewed-by: Rami Rosen <ramirose@gmail.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>