staging: r8188eu: fix declaration to match 'foo *bar'

put '*' next to variable to match kernel style from checkpatch

Signed-off-by: Daniel Watson <ozzloy@challenge-bot.com>
Link: https://lore.kernel.org/r/20220607061113.32633-1-ozzloy@challenge-bot.com


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