iio: hid-sensors: Add connection type

iio: hid-sensors: Add connection type

Some sensor hub firmware are very strict about the connection type
setting. The connection type specifies whether it is an integrated
or external sensor hub.
By default choosing integrated type unless changed via a module
param.

Change-Id: I32cb8346f048af52a54a5831f129d3bde5d60cd6
For: AXIA-3283
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Signed-off-by: Joakim Nordell <joakim.nordell@intel.com>