staging: r8188eu: format block comments

Add ' * ' or ' ' to beginning of block comment lines
to conform to Linux kernel coding style.

Reported by checkpatch:

WARNING: Block comments use * on subsequent lines

Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Link: https://lore.kernel.org/r/0387f3df49d89c17acf96cf072e70c98e81e58f7.1648888462.git.remckee0@gmail.com


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