I saw the method of overclocking mt7621 in a [Chinese forum] (https://www.right.com.cn/forum/thread-4042045-1-1.html).
The method is to modify openwrt\target\linux\ramips\patches-4.14\102-mt7621-fix-cpu-clk-add-clkdev.patch file.
But I did not find the mt7621-fix-cpu-clk-add-clkdev.patch file in the target\linux\ramips\patches-5.15 folder of the main branch of the openwrt/openwrt repositories.
How can I overclock the CPU on the linux-5.15 kernel?