Staging: rtl8192u: ieee80211: Add blank line after declarations

The following patch fixes the checkpatch.pl warning:
drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c WARNING:
Missing a blank line after declarations

Signed-off-by: Hatice ERTURK <haticeerturk27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>