Add driver MAX31725/6 to linux kernel 4.19

[Duke Du (杜祥嘉)]

Hi, 
	The driver MAX31725/6 is added to the linux kernel 4.20 but I want to add driver MAX31725/6 to linux kernel 4.19, how can I do ?

Thanks.
Best regards,
Duke, Du
Quanta Computer Inc.
Tel: +886-3-3272345 Ext: 18047
E-Mail: Duke.Du at quantatw.com