[][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
diff --git a/target/linux/mediatek/patches-5.4/999-1000-backport-pinctrl-pinconf-setting-combo.patch b/target/linux/mediatek/patches-5.4/999-1802-v6.4-backport-pinctrl-pinconf-setting-combo.patch
similarity index 100%
rename from target/linux/mediatek/patches-5.4/999-1000-backport-pinctrl-pinconf-setting-combo.patch
rename to target/linux/mediatek/patches-5.4/999-1802-v6.4-backport-pinctrl-pinconf-setting-combo.patch