arm64: dts: renesas: r8a7795: Add usb companion property in EHCI

This patch adds the "companion" property in the EHCI ch0, ch1 and
ch2 nodes to wait for the usb companion controller startup at resume.
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[remove ch3 node and revise the commit log]
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a7795.dtsi

@@ -1583,6 +1583,7 @@ ehci0: usb@ee080100 {
 			clocks = <&cpg CPG_MOD 703>;
 			phys = <&usb2_phy0>;
 			phy-names = "usb";
+			companion= <&ohci0>;
 			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			resets = <&cpg 703>;
 			status = "disabled";
@@ -1595,6 +1596,7 @@ ehci1: usb@ee0a0100 {
 			clocks = <&cpg CPG_MOD 702>;
 			phys = <&usb2_phy1>;
 			phy-names = "usb";
+			companion= <&ohci1>;
 			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			resets = <&cpg 702>;
 			status = "disabled";
@@ -1607,6 +1609,7 @@ ehci2: usb@ee0c0100 {
 			clocks = <&cpg CPG_MOD 701>;
 			phys = <&usb2_phy2>;
 			phy-names = "usb";
+			companion= <&ohci2>;
 			power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
 			resets = <&cpg 701>;
 			status = "disabled";