Add FPLMN read and program

Change-Id: I9ce8c1af691c28ea9ed69e7b5f03f0c02d1f029b
diff --git a/pysim-testdata/sysmoISIM-SJA2.ok b/pysim-testdata/sysmoISIM-SJA2.ok
index a8c98d9..f9476df 100644
--- a/pysim-testdata/sysmoISIM-SJA2.ok
+++ b/pysim-testdata/sysmoISIM-SJA2.ok
@@ -108,6 +108,12 @@
 	ffffff # unused
 	ffffff # unused
 
+FPLMN:
+	ffffff # unused
+	ffffff # unused
+	ffffff # unused
+	ffffff # unused
+
 USIM Service Table: beff9f9de73e0408400170330000002e00000000
 	Service 2 - Fixed Dialling Numbers (FDN)
 	Service 3 - Extension 2