Add missing carry interconnect

Signed-off-by: David Shah <davey1576@gmail.com>

ECP5/tiledata/PLC2/bits.db

diff --git a/ECP5/tiledata/PLC2/bits.db b/ECP5/tiledata/PLC2/bits.db
index d7e45e3..26d6c0f 100644
--- a/ECP5/tiledata/PLC2/bits.db
+++ b/ECP5/tiledata/PLC2/bits.db
@@ -3102,6 +3102,8 @@
 
 .fixed_conn DI7_SLICE DI7
 
+.fixed_conn E1_HFIE0000 FCO
+
 .fixed_conn FCI HFIE0000
 
 .fixed_conn FCIB_SLICE FCOA_SLICE