ARM: rmobile: Use PRR driver on all Gen3 boards

Mark the PRR as u-boot,dm-pre-reloc in all Gen3 board DTs as it is
needed very early and turn on the CONFIG_SYSCON to allow the PRR
driver to bind as a syscon uclass.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r8a7795.dtsi b/arch/arm/dts/r8a7795.dtsi
index 615b652..405ae9c 100644
--- a/arch/arm/dts/r8a7795.dtsi
+++ b/arch/arm/dts/r8a7795.dtsi
@@ -394,6 +394,7 @@
 		prr: chipid@fff00044 {
 			compatible = "renesas,prr";
 			reg = <0 0xfff00044 0 4>;
+			u-boot,dm-pre-reloc;
 		};
 
 		sysc: system-controller@e6180000 {
diff --git a/arch/arm/dts/r8a7796.dtsi b/arch/arm/dts/r8a7796.dtsi
index 9e6a5f2..6a6bfd4 100644
--- a/arch/arm/dts/r8a7796.dtsi
+++ b/arch/arm/dts/r8a7796.dtsi
@@ -377,6 +377,7 @@
 		prr: chipid@fff00044 {
 			compatible = "renesas,prr";
 			reg = <0 0xfff00044 0 4>;
+			u-boot,dm-pre-reloc;
 		};
 
 		sysc: system-controller@e6180000 {
diff --git a/configs/r8a7795_salvator-x_defconfig b/configs/r8a7795_salvator-x_defconfig
index 00d534b..8c7ad6b 100644
--- a/configs/r8a7795_salvator-x_defconfig
+++ b/configs/r8a7795_salvator-x_defconfig
@@ -25,6 +25,8 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
 CONFIG_CLK=y
 CONFIG_CLK_RENESAS=y
 CONFIG_DM_GPIO=y
diff --git a/configs/r8a7795_ulcb_defconfig b/configs/r8a7795_ulcb_defconfig
index 4c57ffc..4eaedfc 100644
--- a/configs/r8a7795_ulcb_defconfig
+++ b/configs/r8a7795_ulcb_defconfig
@@ -25,6 +25,8 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
 CONFIG_CLK=y
 CONFIG_CLK_RENESAS=y
 CONFIG_DM_GPIO=y
diff --git a/configs/r8a7796_salvator-x_defconfig b/configs/r8a7796_salvator-x_defconfig
index 4a36469..849c668 100644
--- a/configs/r8a7796_salvator-x_defconfig
+++ b/configs/r8a7796_salvator-x_defconfig
@@ -26,6 +26,8 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
 CONFIG_CLK=y
 CONFIG_CLK_RENESAS=y
 CONFIG_DM_GPIO=y
diff --git a/configs/r8a7796_ulcb_defconfig b/configs/r8a7796_ulcb_defconfig
index 989edf6..8fa49c2 100644
--- a/configs/r8a7796_ulcb_defconfig
+++ b/configs/r8a7796_ulcb_defconfig
@@ -26,6 +26,8 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
 CONFIG_CLK=y
 CONFIG_CLK_RENESAS=y
 CONFIG_DM_GPIO=y