staging: r8188eu: remove unnecessary spaces

Conform to Linux kernel coding style. Issue found by checkpatch:

WARNING: Statements should start on a tabstop

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


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