[nrf52] Force 8 IRQ capable pins

See ARMmbed/mbed-os#10949
Fixes arduino/ArduinoCore-nRF528x-mbedos#7

Author: facchinm

mbed-os-to-arduino

@@ -32,10 +32,39 @@ rm -rf .mbedignore
 mbed target $BOARDNAME
 mbed toolchain GCC_ARM
 echo -e "#include \"mbed.h\"\nint main() {}" > main.cpp
-echo -e "{\n\"macros\": [\n\"MBED_HEAP_STATS_ENABLED=1\",\n\"MBED_STACK_STATS_ENABLED=1\",\n\"MBED_MEM_TRACING_ENABLED=1\"\n],\n\"target_overrides\": {\n   \"*\": {\n\"platform.stdio-buffered-serial\": true,\n\"rtos.main-thread-stack-size\": 32768,\n\"platform.stdio-baud-rate\": 115200,\n\"platform.default-serial-baud-rate\": 115200\n}\n}\n}\n" > mbed_app.json
+echo -e "{
+	\"macros\": [
+		\"MBED_HEAP_STATS_ENABLED=1\",
+		\"MBED_STACK_STATS_ENABLED=1\",
+		\"MBED_MEM_TRACING_ENABLED=1\",
+		],
+	\"target_overrides\": {
+		\"*\": {
+			\"platform.stdio-buffered-serial\": true,
+			\"platform.stdio-baud-rate\": 115200,
+			\"platform.default-serial-baud-rate\": 115200,
+		}
+	}
+}" > mbed_app.json
 
 if [ $BOARDNAME == "ARDUINO_NANO33BLE" ]; then
-echo -e "{\n\"macros\": [\n\"MBED_HEAP_STATS_ENABLED=1\",\n\"MBED_STACK_STATS_ENABLED=1\",\n\"MBED_MEM_TRACING_ENABLED=1\"\n],\n\"target_overrides\": {\n   \"*\": {\n\"platform.stdio-buffered-serial\": true,\n\"platform.stdio-baud-rate\": 115200,\n\"platform.default-serial-baud-rate\": 115200,\n\"rtos.main-thread-stack-size\": 32768,\n\"target.mbed_app_start\": \"0x10000\"}\n}\n}\n" > mbed_app.json
+echo -e "{
+	\"macros\": [
+		\"MBED_HEAP_STATS_ENABLED=1\",
+		\"MBED_STACK_STATS_ENABLED=1\",
+		\"MBED_MEM_TRACING_ENABLED=1\",
+		\"NRFX_GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS=8\"
+		],
+	\"target_overrides\": {
+		\"*\": {
+			\"platform.stdio-buffered-serial\": true,
+			\"platform.stdio-baud-rate\": 115200,
+			\"platform.default-serial-baud-rate\": 115200,
+			\"rtos.main-thread-stack-size\": 32768,
+			\"target.mbed_app_start\": \"0x10000\"
+		}
+	}
+}" > mbed_app.json
 fi
 
 if [ -d $ARDUINOCORE/conf ]; then