!5286 serial: sc16is7xx: convert from _raw_ to _noinc_ regmap functions for FIFO

Merge Pull Request from: @ci-robot 
 
PR sync from: "GONG, Ruiqi" <gongruiqi1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/XICC3LD7CYWYCAXV54FRRLDPN7AMF2SD/ 
 
https://gitee.com/src-openeuler/kernel/issues/I96ZNC 
 
Link:https://gitee.com/openeuler/kernel/pulls/5286

 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>