[][kernel][pinctrl][Rename backport pinctrl patch]

[Description]
Change backport pinctrl patch name.

[Release-log]
N/A.

Change-Id: Iaf7c7536fc05be721af1d9a54d04c9a2ebb4d58b
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8359295
1 file changed