configs: reset: fu540: enable dm reset framework for SiFive

Add necessary defconfig and Kconfig entries to enable SiFive SoC's
reset driver so as to utilise U-Boot's reset framework.
Signed-off-by: NSagar Shrikant Kadam <sagar.kadam@sifive.com>
Reviewed-by: NPragnesh Patel <Pragnesh.patel@sifive.com>
Reviewed-by: NBin Meng <bin.meng@windriver.com>
Tested-by: NBin Meng <bin.meng@windriver.com>

configs/sifive_fu540_defconfig

@@ -25,3 +25,5 @@ CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_SPL_CLK=y
 CONFIG_DM_MTD=y
+CONFIG_SPL_DM_RESET=y
+CONFIG_DM_RESET=y

drivers/reset/Kconfig

@@ -148,6 +148,15 @@ config RESET_IMX7
 	help
 	  Support for reset controller on i.MX7/8 SoCs.
 
+config RESET_SIFIVE
+	bool "Reset Driver for SiFive SoC's"
+	depends on DM_RESET && CLK_SIFIVE_FU540_PRCI && TARGET_SIFIVE_FU540
+	default y
+	help
+	  PRCI module within SiFive SoC's provides mechanism to reset
+	  different hw blocks like DDR, gemgxl. With this driver we leverage
+	  U-Boot's reset framework to reset these hardware blocks.
+
 config RESET_SYSCON
 	bool "Enable generic syscon reset driver support"
 	depends on DM_RESET

drivers/reset/Makefile

@@ -23,5 +23,6 @@ obj-$(CONFIG_RESET_MTMIPS) += reset-mtmips.o
 obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o
 obj-$(CONFIG_RESET_HISILICON) += reset-hisilicon.o
 obj-$(CONFIG_RESET_IMX7) += reset-imx7.o
+obj-$(CONFIG_RESET_SIFIVE) += reset-sifive.o
 obj-$(CONFIG_RESET_SYSCON) += reset-syscon.o
 obj-$(CONFIG_RESET_RASPBERRYPI) += reset-raspberrypi.o