dts: nrf54lm20a: align GPIOTE IRQn to non-secure build

Use different GPIOTE interrupt number when building for
cpuapp/ns.

Signed-off-by: Michał Stasiak <michal.stasiak@nordicsemi.no>

Author: mstasiaknordic

dts/arm/nordic/nrf54lm20a_enga_cpuapp.dtsi

@@ -75,11 +75,19 @@ nvic: &cpuapp_nvic {};
 };
 
 &gpiote20 {
+#ifdef USE_NON_SECURE_ADDRESS_MAP
+	interrupts = <218 NRF_DEFAULT_IRQ_PRIORITY>;
+#else
 	interrupts = <219 NRF_DEFAULT_IRQ_PRIORITY>;
+#endif
 };
 
 &gpiote30 {
+#ifdef USE_NON_SECURE_ADDRESS_MAP
+	interrupts = <268 NRF_DEFAULT_IRQ_PRIORITY>;
+#else
 	interrupts = <269 NRF_DEFAULT_IRQ_PRIORITY>;
+#endif
 };
 
 &dppic00 {