staging: rtl8712: rename bSurpriseRemoved to surprise_removed

 - Rename structure field bSurprisedRemoved to surprised_removed to avoid
camelcase. Suggested by checkpatch.
 - Change type to bool as the variable is used as a boolean.

Signed-off-by: Himadri Pandya <himadri18.07@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>