staging: r8188eu: combine both sides of conditional statement

Both sides of conditional statement are the same except for the comment.
Additional instance found with git grep.

Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Link: https://lore.kernel.org/r/d33c51bc3a20fa25e4737b258f3b1c42cc8124e3.1649011311.git.remckee0@gmail.com


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