Declare device_type structure as const as it is only stored in the
type field of a device structure. This field is of type const, so add
const to the declaration of device_type structure.
File size before: drivers/hid/intel-ish-hid/ishtp/bus.o
text data bss dec hex filename
4260 336 16 4612 1204 hid/intel-ish-hid/ishtp/bus.o
File size after: drivers/hid/intel-ish-hid/ishtp/bus.o
text data bss dec hex filename
4324 272 16 4612 1204 hid/intel-ish-hid/ishtp/bus.o