staging: speakup: fixes braces {} should be used on all arms of this statement

This patch fixes the checks reported by checkpatch.pl
for braces {} should be used on all arms of this statement.

Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>