i2c: mux: reg: Provide of_match_table

of_match_table was not filled which prevents device to be
instantiated from device tree node.
Signed-off-by: Lukasz Gemborowski <lukasz.gemborowski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/muxes/i2c-mux-reg.c

@@ -260,6 +260,7 @@ static struct platform_driver i2c_mux_reg_driver = {
 	.remove	= i2c_mux_reg_remove,
 	.driver	= {
 		.name	= "i2c-mux-reg",
+		.of_match_table = of_match_ptr(i2c_mux_reg_of_match),
 	},
 };