ASoC: wcd: add support for extension cable feature

Add support to detect extension cable feature using
electrical insertion and FSM removal interrupts.
Add option to configure driver for either special
headset detection or extn cable feature.

CRs-Fixed: 662020
Change-Id: I6c42edbf4052d4e08473c34bad9e7122792792b4
Signed-off-by: Simmi Pateriya <simmip@codeaurora.org>