obotics-cape.dtso: add of-symlink entries

script_support/components/CAPE/ROBOTICS/device-tree-overlay/robotics-cape.dtso

@@ -47,6 +47,7 @@
 			#pwm-cells = <3>;
             status = "okay";
 			clocks = <&fabric_clk3>;
+			symlink = "bone/pwm/1";
 		};
 
 		bone_pwm_2: pwm@41500000 {
@@ -56,6 +57,7 @@
 			#pwm-cells = <3>;
             status = "okay";
 			clocks = <&fabric_clk3>;
+			symlink = "bone/pwm/2";
 		};
 	};
 };