boards/nrf9160-dk: enable GNSS for modem_ns config

boards/arm/nrf91/nrf9160-dk/configs/modem_ns/defconfig

@@ -23,14 +23,17 @@ CONFIG_BUILTIN=y
 CONFIG_DEBUG_BUSFAULT=y
 CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEBUG_UORB=y
 CONFIG_DEBUG_USAGEFAULT=y
 CONFIG_EXAMPLES_HELLO=y
 CONFIG_EXAMPLES_WGET=y
 CONFIG_EXPERIMENTAL=y
 CONFIG_FS_PROCFS=y
+CONFIG_GPSUTILS_MINMEA_LIB=y
 CONFIG_IDLETHREAD_STACKSIZE=2048
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBC_FLOATINGPOINT=y
 CONFIG_MM_REGIONS=2
 CONFIG_NET=y
 CONFIG_NETDB_DNSCLIENT=y
@@ -58,6 +61,8 @@ CONFIG_RAW_BINARY=y
 CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_WAITPID=y
+CONFIG_SENSORS=y
+CONFIG_SENSORS_GPS=y
 CONFIG_STACK_COLORATION=y
 CONFIG_STACK_USAGE=y
 CONFIG_START_DAY=26
@@ -68,3 +73,6 @@ CONFIG_SYSTEM_CUTERM=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_TASK_NAME_SIZE=32
 CONFIG_UART0_SERIAL_CONSOLE=y
+CONFIG_UORB=y
+CONFIG_UORB_LISTENER=y
+CONFIG_USENSOR=y

boards/arm/nrf91/nrf9160-dk/src/nrf91_bringup.c

@@ -64,7 +64,8 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
-#define NRF91_TIMER (0)
+#define NRF91_TIMER         (0)
+#define NRF91_GNSS_BATCHNUM (10)
 
 /****************************************************************************
  * Private Functions
@@ -157,6 +158,17 @@ int nrf91_bringup(void)
     }
 #endif
 
+#ifdef CONFIG_NRF91_MODEM_GNSS
+  /* Initialize modem GNSS interface */
+
+  ret = nrf91_gnss_register(0, NRF91_GNSS_BATCHNUM);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to initialize GNSS interface%d\n",  ret);
+    }
+#endif
+
 #ifdef CONFIG_NRF91_PROGMEM
   ret = nrf91_progmem_init();
   if (ret < 0)