modem: Implement voice calls in modem and add voice suite

Change-Id: Ib402effc830db293f27a877658894e454a93a606
diff --git a/suites/voice/suite.conf b/suites/voice/suite.conf
new file mode 100644
index 0000000..40d9f97
--- /dev/null
+++ b/suites/voice/suite.conf
@@ -0,0 +1,9 @@
+resources:
+  ip_address:
+  - times: 5 # msc, bsc, hlr, stp, mgw
+  bts:
+  - times: 1
+  modem:
+  - times: 2
+    features:
+    - voice