The "altr,modrst-offset" property represents the offset into the reset manager
that is the first register to be used by the driver to bring peripherals out
of reset.
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
 Required properties:
 - compatible : "altr,rst-mgr"
 - reg : Should contain 1 register ranges(address and length)
+- altr,modrst-offset : Should contain the offset of the first modrst register.
 - #reset-cells: 1
 
 Example:
                #reset-cells = <1>;
                compatible = "altr,rst-mgr";
                reg = <0xffd05000 0x1000>;
+               altr,modrst-offset = <0x10>;
        };
 
                        #reset-cells = <1>;
                        compatible = "altr,rst-mgr";
                        reg = <0xffd05000 0x1000>;
+                       altr,modrst-offset = <0x10>;
                };
 
                usbphy0: usbphy@0 {
 
                        #reset-cells = <1>;
                        compatible = "altr,rst-mgr";
                        reg = <0xffd05000 0x100>;
+                       altr,modrst-offset = <0x20>;
                };
 
                scu: snoop-control-unit@ffffc000 {