hwmon: qpnp-adc Add support for fsm9900 target

Add support for thermistor design and mapping
table used on fsm9900 target.

Change-Id: I1c22e6a55ddb5dfcb75b69ec6f807f8c2d6b2eb8
Acked-by: Jim Granitzki <jamesg@qti.qualcomm.com>
Signed-off-by: Venkatesh Yadav Abbarapu <quicvenkat@codeaurora.org>