Staging:rtl8187se: Add space before open parenthesis of if condition

This patch fixes the checkpatch.pl warning :
space required before the open parenthesis '('
in ieee80211/ieee80211_softmac.c.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Reviewed-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>