staging: ks7010: convert MIB preprocessor defs into an enum

This commit just change some preprocessor definitions related
with MIB data types into an enumeration which is much cleaner
for this here.

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