LoongArch: Update Loongson-3 default config file

1, Enable PSI tracking.
2, Enable IKCONFIG/IKHEADERS.
3, Enable Generic PHY driver.
4, Enable Motorcomm PHY driver.
5, Enable ORC stack unwinder.
6, Enable some squashfs options.
7, Enable some netfilter options.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>