staging: wlan-ng: Remove repeated words in comments

Remove duplicate words in comments at prism2mib and prism2sta files.

Signed-off-by: Igor Matheus Andrade Torrente <igormtorrente@gmail.com>
Link: https://lore.kernel.org/r/20200803022022.501-1-igormtorrente@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>