ASoC: wcd: update cross connection logic for removal

Bit 4 of result2 register tells whether the headset
is connected or not. If this bit is read as 1, it
means the headset is removed. Ignore cross connection
result if this bit is set to 1.

CRs-Fixed: 794948
Change-Id: Ia4ac234155018b757247f3a25b6583ae9c08d764
Signed-off-by: Simmi Pateriya <simmip@codeaurora.org>