riscv: reset: k1: Add reset driver

Add spacemit reset driver.

Signed-off-by: Huan Zhou <me@per1cycle.org>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 9d438a7..8cab734 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -34,3 +34,4 @@
 obj-$(CONFIG_RESET_AT91) += reset-at91.o
 obj-$(CONFIG_$(PHASE_)RESET_JH7110) += reset-jh7110.o
 obj-$(CONFIG_RESET_RZG2L_USBPHY_CTRL) += reset-rzg2l-usbphy-ctrl.o
+obj-$(CONFIG_RESET_SPACEMIT_K1) += reset-spacemit-k1.o