ARM: dts: STi: Add fake reg property for remote processors

As st231-gp0, st231-delta are part of SoC, we add a fake reg
property instead of moving all these nodes outside soc node.
This allows to fix the following warning when compiling
dtb with W=1 option:

arch/arm/boot/dts/stih407-b2120.dtb: Warning (simple_bus_reg):
Node /soc/st231-gp0 missing or empty reg/ranges property
arch/arm/boot/dts/stih407-b2120.dtb: Warning (simple_bus_reg):
Node /soc/st231-delta missing or empty reg/ranges property
arch/arm/boot/dts/stih407-b2120.dtb: Warning (simple_bus_reg):
Node /soc/delta0 missing or empty reg/ranges property
arch/arm/boot/dts/stih410-b2120.dtb: Warning (simple_bus_reg):
Node /soc/st231-gp0 missing or empty reg/ranges property
arch/arm/boot/dts/stih410-b2120.dtb: Warning (simple_bus_reg):
Node /soc/st231-delta missing or empty reg/ranges property
arch/arm/boot/dts/stih410-b2120.dtb: Warning (simple_bus_reg):
Node /soc/delta0 missing or empty reg/ranges property
arch/arm/boot/dts/stih410-b2260.dtb: Warning (simple_bus_reg):
Node /soc/st231-gp0 missing or empty reg/ranges property
arch/arm/boot/dts/stih410-b2260.dtb: Warning (simple_bus_reg):
Node /soc/st231-delta missing or empty reg/ranges property
arch/arm/boot/dts/stih410-b2260.dtb: Warning (simple_bus_reg):
Node /soc/delta0 missing or empty reg/ranges property
arch/arm/boot/dts/stih418-b2199.dtb: Warning (simple_bus_reg):
Node /soc/st231-gp0 missing or empty reg/ranges property
arch/arm/boot/dts/stih418-b2199.dtb: Warning (simple_bus_reg):
Node /soc/st231-delta missing or empty reg/ranges property
arch/arm/boot/dts/stih418-b2199.dtb: Warning (simple_bus_reg):
Node /soc/delta0 missing or empty reg/ranges property
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>

arch/arm/boot/dts/stih407-family.dtsi

@@ -805,8 +805,9 @@ mailbox3: mailbox@8f03000 {
 			status		= "okay";
 		};
 
-		st231_gp0: st231-gp0 {
+		st231_gp0: st231-gp0@0 {
 			compatible	= "st,st231-rproc";
+			reg		= <0 0>;
 			memory-region	= <&gp0_reserved>;
 			resets		= <&softreset STIH407_ST231_GP0_SOFTRESET>;
 			reset-names	= "sw_reset";
@@ -818,8 +819,9 @@ st231_gp0: st231-gp0 {
 			mboxes = <&mailbox0 0 2>, <&mailbox2 0 1>, <&mailbox0 0 3>, <&mailbox2 0 0>;
 		};
 
-		st231_delta: st231-delta {
+		st231_delta: st231-delta@0 {
 			compatible	= "st,st231-rproc";
+			reg		= <0 0>;
 			memory-region	= <&delta_reserved>;
 			resets		= <&softreset STIH407_ST231_DMU_SOFTRESET>;
 			reset-names	= "sw_reset";
@@ -982,8 +984,9 @@ sti_uni_reader1: sti-uni-reader@8d84000 {
 			status = "disabled";
 		};
 
-		delta0 {
+		delta0@0 {
 			compatible = "st,st-delta";
+			reg = <0 0>;
 			clock-names = "delta",
 				      "delta-st231",
 				      "delta-flash-promip";

arch/arm/boot/dts/stih410.dtsi

@@ -274,7 +274,7 @@ thermal@91a0000 {
 			interrupts = <GIC_SPI 205 IRQ_TYPE_EDGE_RISING>;
 		};
 
-		delta0 {
+		delta0@0 {
 			compatible = "st,st-delta";
 			clock-names = "delta",
 				      "delta-st231",