staging: r8188eu: Fix coding style error

Move opening brace to next line to conform to kernel coding style.

Fixes the following checkpatch error:
ERROR: open brace '{' following function definitions go on the next line

Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://lore.kernel.org/r/20211201153039.305245-1-abdun.nihaal@gmail.com


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