boards: st: Set csbounds explicitly instead of relying on default value

The default value has changed in previous commits, so set it explicitly
in the devicetree with the new st,csbound property.

Signed-off-by: Arthur Gay <[email protected]>

Author: arthur-mmlw

boards/st/b_u585i_iot02a/b_u585i_iot02a-common.dtsi

@@ -151,6 +151,7 @@ stm32_lp_tick_source: &lptim1 {
 		max-frequency = <DT_FREQ_M(133)>;
 		fixed-latency;
 		burst-length = <3>;
+		st,csbound = <10>;
 		status = "okay";
 	};
 };

boards/st/stm32h7s78_dk/stm32h7s78_dk.dts

@@ -217,6 +217,7 @@
 		read-latency = <4>;
 		write-latency = <1>;
 		burst-length = <0>;
+		st,csbound = <11>;
 		status = "okay";
 	};
 };

boards/st/stm32n6570_dk/stm32n6570_dk_common.dtsi

@@ -342,6 +342,7 @@ zephyr_udc0: &usbotg_hs1 {
 		read-latency = <4>;
 		write-latency = <1>;
 		burst-length = <0>;
+		st,csbound = <11>;
 		status = "okay";
 	};
 };