extcon: add MAX14526 MUIC support

MAX14526 is a powerful extcon chip which allows detection of various
plugs like usb, mhl, uart, headset etc. This version of driver
implements support of AP-usb and CP-usb/uart paths.

Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # LG P880 T30
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # LG P895 T30
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 6fd3d2b..fbb7335 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -19,4 +19,13 @@
 	  Enable extcon support for sandbox. This is an emulation of a real
 	  extcon. Currectly all configuration is done in the probe.
 
+config EXTCON_MAX14526
+	bool "Maxim MAX14526 EXTCON Support"
+	depends on DM_I2C
+	depends on EXTCON
+	help
+	  If you say yes here you get support for the MUIC device of
+	  Maxim MAX14526. The MAX14526 MUIC is a USB port accessory
+	  detector and switch.
+
 endmenu