ARM: rmobile: Enable RPC on Salvator-X, ULCB, Ebisu

Enable the RPC Hyperflash driver on R8A7795,R8A7796,R8A77965
Salvator-X,ULCB and R8A77990 Ebisu. Note that to make the HF
accessible, mainline ATF is mandatory and must be built with
RCAR_RPC_HYPERFLASH_LOCKED=0 . Note that this is intended for
development and testing convenience only and must be disabled
in deployment for platform security reasons.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r8a77950-salvator-x-u-boot.dts b/arch/arm/dts/r8a77950-salvator-x-u-boot.dts
index e039e33..36c8a44 100644
--- a/arch/arm/dts/r8a77950-salvator-x-u-boot.dts
+++ b/arch/arm/dts/r8a77950-salvator-x-u-boot.dts
@@ -8,6 +8,11 @@
 #include "r8a77950-salvator-x.dts"
 #include "r8a77950-u-boot.dtsi"
 
+&rpc {
+	reg = <0 0xee200000 0 0x100>, <0 0x08000000 0 0x04000000>;
+	status = "okay";
+};
+
 &sdhi0 {
 	sd-uhs-sdr12;
 	sd-uhs-sdr25;