msm: mdm: GPIO changes for I2S devices

mdm GPIO configuration for I2S devices is now supported. Additionally
the mdm-driver can now handle the case where one of the lines it is
monitoring is assigned to GPIO 0.

Change-Id: I75fd06fc4f83fe652ab3bbb75980f2454a0f3621
Signed-off-by: Ameya Thakur <ameyat@codeaurora.org>
7 files changed