apn_fsm: Set default timeout for APN activation to 65s

The current timeout is too low, taking into account that SM PDP
Activation timeout is already 30. When SM fails, it will retry sending
PDP Context Activation Req. Hence, give it enough time to at least retry
once, plus some extra buffer time (eg to go through GMM attach once).

Change-Id: I34f9b0a5ad5767155dc3e4c0ac1c4bf1521be596

src/host/layer23/src/common/apn_fsm.c

@@ -30,7 +30,7 @@
 #define X(s) (1 << (s))
 
 static struct osmo_tdef T_defs_apn[] = {
-	{ .T=1, .default_val=30, .desc = "Activating timeout (s)" },
+	{ .T=1, .default_val=65, .desc = "Activating timeout (s)" },
 	{ 0 } /* empty item at the end */
 };