default-suites.conf: Add gprs suite

Change-Id: I6cc71529fd6e3b99b8a53c0b91377df6d3a636d3
diff --git a/example/default-suites.conf b/example/default-suites.conf
index cc65a53..83dd079 100644
--- a/example/default-suites.conf
+++ b/example/default-suites.conf
@@ -3,21 +3,25 @@
 - ussd:sysmo
 - aoip_ussd:sysmo
 - voice:sysmo
+- gprs:sysmo
 - sms:trx-b200
 - aoip_sms:trx-b200
 - ussd:trx-b200
 - aoip_ussd:trx-b200
 - voice:trx-b200
+- gprs:trx-b200
 - sms:trx-sysmocell5000
 - aoip_sms:trx-sysmocell5000
 - ussd:trx-sysmocell5000
 - aoip_ussd:trx-sysmocell5000
 - voice:trx-sysmocell5000
+- gprs:trx-sysmocell5000
 - sms:octphy
 - aoip_sms:octphy
 - ussd:octphy
 - aoip_ussd:octphy
 - voice:octphy
+- gprs:octphy
 - smpp
 - aoip_smpp
 - aoip_encryption