staging: ks7010: use definitions from kernel headers in hostif_data_indication function

Function hostif_data_indication checks some hardcoded values in a
switch-case block. This values are defined in uapi/linux/llc.h
header. Just use them and avoid a comment in the code improving
readability a bit.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>