samples: tests: remove pdk boards configs

[KRKNWK-19447]

Signed-off-by: Krzysztof Taborowski <krzysztof.taborowski@nordicsemi.no>

samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

@@ -5,31 +5,36 @@
  */
 
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
+/* Application does not use cpuflpr core. Assign whole RRAM and RAM to cpuapp. */
 &cpuapp_rram {
-	reg = < 0x0 DT_SIZE_K(1524) >;
+	reg = <0x0 DT_SIZE_K(1524)>;
 };
 
- &pinctrl {
+&cpuapp_sram {
+	reg = <0x20000000 DT_SIZE_K(256)>;
+	ranges = <0x0 0x20000000  0x40000>;
+};
+
+&pinctrl {
 	spi21_default: spi21_default {
 		group1 {
 			psels = <NRF_PSEL(SPIM_SCK, 2, 6)>,
-				<NRF_PSEL(SPIM_MISO, 1, 11)>,
-				<NRF_PSEL(SPIM_MOSI, 2, 8)>;
+			        <NRF_PSEL(SPIM_MISO, 1, 11)>,
+			        <NRF_PSEL(SPIM_MOSI, 2, 8)>;
 		};
 	};
 
 	spi21_sleep: spi21_sleep {
 		group1 {
 			psels = <NRF_PSEL(SPIM_SCK, 2, 6)>,
-				<NRF_PSEL(SPIM_MISO, 1, 11)>,
-				<NRF_PSEL(SPIM_MOSI, 2, 8)>;
+			        <NRF_PSEL(SPIM_MISO, 1, 11)>,
+			        <NRF_PSEL(SPIM_MOSI, 2, 8)>;
 			low-power-enable;
 		};
 	};
 };
 
- sid_semtech: &spi21 {
+sid_semtech: &spi21 {
 	compatible = "nordic,nrf-spim";
 	status = "okay";
 	pinctrl-0 = <&spi21_default>;
@@ -68,7 +73,19 @@
 			gpios = <&gpio0 0x3  0x0>;
 			label = "semtech_sx1262 DIO1";
 		};
-	};	
+	};
+
+	// Use watchdog wdt31 as the application watchdog
+	watchdog0 = &wdt31;
+};
+
+// TODO: re-enable HWFC once it's fixed
+&uart20 {
+	/delete-property/ hw-flow-control;
+};
+
+&gpio0 {
+	status = "okay";
 };
 
 &gpio1 {
@@ -79,6 +96,6 @@
 	status = "okay";
 };
 
-&gpio0 {
+&wdt31 {
 	status = "okay";
 };