arm64: tegra: Add pinmux for PWM-based DFLL support on P2597

Add pinmux for PWM-based DFLL support.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi

@@ -1278,6 +1278,20 @@ shutdown {
 				nvidia,open-drain = <TEGRA_PIN_DISABLE>;
 			};
 		};
+
+		dvfs_pwm_active_state: dvfs_pwm_active {
+			dvfs_pwm_pbb1 {
+				nvidia,pins = "dvfs_pwm_pbb1";
+				nvidia,tristate = <TEGRA_PIN_DISABLE>;
+			};
+		};
+
+		dvfs_pwm_inactive_state: dvfs_pwm_inactive {
+			dvfs_pwm_pbb1 {
+				nvidia,pins = "dvfs_pwm_pbb1";
+				nvidia,tristate = <TEGRA_PIN_ENABLE>;
+			};
+		};
 	};
 
 	pwm@7000a000 {