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>
diff --git a/arch/arm/mach-msm/devices.h b/arch/arm/mach-msm/devices.h
index 886a9ae..bc60df2 100644
--- a/arch/arm/mach-msm/devices.h
+++ b/arch/arm/mach-msm/devices.h
@@ -377,6 +377,7 @@
 extern struct platform_device msm_bus_8064_cpss_fpb;
 
 extern struct platform_device mdm_8064_device;
+extern struct platform_device i2s_mdm_8064_device;
 extern struct platform_device msm_dsps_device_8064;
 extern struct platform_device *msm_8974_stub_regulator_devices[];
 extern int msm_8974_stub_regulator_devices_len;