boards: cxd56xx: Register cxd5610 gnss driver

Register device file for cxd5610 gnss driver.

boards/arm/cxd56xx/spresense/include/board.h

@@ -66,6 +66,7 @@
 #include "cxd56_rpr0521rs.h"
 #include "cxd56_scd41.h"
 #include "cxd56_sensors.h"
+#include "cxd56_gnss_addon.h"
 
 #ifdef CONFIG_VIDEO_ISX012
 #  include "cxd56_isx012.h"

boards/arm/cxd56xx/spresense/src/cxd56_bringup.c

@@ -493,6 +493,14 @@ int cxd56_bringup(void)
     }
 #endif
 
+#if defined(CONFIG_CXD56_GNSS_ADDON) && !defined(CONFIG_CXD56_GNSS_ADDON_LATE_INITIALIZE)
+  ret = board_gnss_addon_initialize("/dev/gps2", 0);
+  if (ret < 0)
+    {
+      _err("ERROR: Failed to initialize gnss addon.\n");
+    }
+#endif
+
 #ifdef CONFIG_CXD56_GEOFENCE
   ret = cxd56_geofenceinitialize("/dev/geofence");
   if (ret < 0)