staging: r8188eu: add blank line between functions

Conform to Linux kernel coding style.
Noticed when completing a different patch.

Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Link: https://lore.kernel.org/r/ccacca6f679a879ad2032dc0aeb0b0156e3a847b.1649011311.git.remckee0@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>