staging: rtl8188eu: Move a blank line

Move a blank line from in the middle of a declaration list to
after the declaration list, to improve readability.

Issue found by checkpatch.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>