[][openwrt][common][watchgog][fix watchdog interrupt ID]

[Description]
Add support for the watchdog interrupt by fixing the interrupt IDs
in the device trees.

Please implement or call your ISR function in
'mtk_wdt_isr' of 'mtk_wdt.c':

target/linux/mediatek/patches-5.4/
999-2050-watchdog-add-mt7986-assert.patch#224

[Release-log]
N/A

Change-Id: I81f6d2d8dc43cb4a316a690dd4bba7b18148ea54
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8099405
6 files changed