extcon: sm5502: Add support for SM5703

SM5703 is another MFD from Silicon Mitus which has a very similar MUIC
unit to the one in SM5502. The only difference I've noticed is slightly different
configuration only enables the interrupts which are exactly the same as on SM5502.
If we make use of different interrupts in the future, this can be improved by having
a separate struct for SM5703, but the main functionality (detecting cable or OTG adapter)
is working properly.

Signed-off-by: Markuss Broks <markuss.broks@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/extcon/Kconfig

@@ -156,7 +156,7 @@ config EXTCON_RT8973A
 	  from abnormal high input voltage (up to 28V).
 
 config EXTCON_SM5502
-	tristate "Silicon Mitus SM5502/SM5504 EXTCON support"
+	tristate "Silicon Mitus SM5502/SM5504/SM5703 EXTCON support"
 	depends on I2C
 	select IRQ_DOMAIN
 	select REGMAP_I2C

drivers/extcon/extcon-sm5502.c

@@ -798,6 +798,7 @@ static const struct sm5502_type sm5504_data = {
 static const struct of_device_id sm5502_dt_match[] = {
 	{ .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data },
 	{ .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data },
+	{ .compatible = "siliconmitus,sm5703-muic", .data = &sm5502_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
@@ -830,6 +831,7 @@ static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 static const struct i2c_device_id sm5502_i2c_id[] = {
 	{ "sm5502", (kernel_ulong_t)&sm5502_data },
 	{ "sm5504", (kernel_ulong_t)&sm5504_data },
+	{ "sm5703", (kernel_ulong_t)&sm5502_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);