dts: Decrease stm32mp2 link frequencies

750000000 causes the mipid02 to overrun, decrease to 500000000 so it can
catch a breath.

Signed-off-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>

Author: bemug-st

dts/stm32mp2/pcb4444_vd1943.dts

@@ -28,7 +28,7 @@
 						data-lanes = <1 2>;
 						remote-endpoint = <&csi_sink>;
 						clock-noncontinuous;
-						link-frequencies = /bits/ 64 <750000000>;
+						link-frequencies = /bits/ 64 <500000000>;
 						lane-polarities = <1 1 1>;
 					};
 				};

dts/stm32mp2/pcb4444_vd5943.dts

@@ -28,7 +28,7 @@
 						data-lanes = <1 2>;
 						remote-endpoint = <&csi_sink>;
 						clock-noncontinuous;
-						link-frequencies = /bits/ 64 <750000000>;
+						link-frequencies = /bits/ 64 <500000000>;
 						lane-polarities = <1 1 1>;
 					};
 				};

dts/stm32mp2/pcb4444_vd5943_illuminator.dts

@@ -30,7 +30,7 @@
 						data-lanes = <1 2>;
 						remote-endpoint = <&csi_sink>;
 						clock-noncontinuous;
-						link-frequencies = /bits/ 64 <750000000>;
+						link-frequencies = /bits/ 64 <500000000>;
 						lane-polarities = <1 1 1>;
 					};
 				};

dts/stm32mp2/pcb4444_vd5943_slave.dts

@@ -30,7 +30,7 @@
 						data-lanes = <1 2>;
 						remote-endpoint = <&csi_sink>;
 						clock-noncontinuous;
-						link-frequencies = /bits/ 64 <750000000>;
+						link-frequencies = /bits/ 64 <500000000>;
 						lane-polarities = <1 1 1>;
 					};
 				};