reset: canaan: add reset driver for Kendryte K230

Add support for the resets on Canaan Kendryte K230 SoC. The driver
support CPU0, CPU1, L2 cache flush, hardware auto clear and software
clear resets.

Tested-by: Chen Wang <unicorn_wang@outlook.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
Link: https://lore.kernel.org/r/20250613-k230-reset-v4-2-e5266d2be440@pigmoral.tech


Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>