Fix Ubiquiti NanoStation [Loco] AC architecture in qmp.profiles.conf

Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>

qmp.profiles.conf

@@ -143,7 +143,7 @@ EXT4IMAGE=""
 
 [ "$TPROFILE" == nanostation-ac ] && {
   NAME=Ubiquiti_NanoStation-AC
-  ARCH=ar71xx
+  ARCH=ath79
   SUBARCH=generic
   PROFILE=ubnt_nanostation-ac
   FLAVOR=qmp_small
@@ -153,7 +153,7 @@ EXT4IMAGE=""
 
 [ "$TPROFILE" == nanostation-ac-loco ] && {
   NAME=Ubiquiti_NanoStation-AC-loco
-  ARCH=ar71xx
+  ARCH=ath79
   SUBARCH=generic
   PROFILE=ubnt_nanostation-ac-loco
   FLAVOR=qmp_small