kvdb: move channeldb/kvdb to top level

channeldb/migration/create_tlb.go

@@ -3,7 +3,7 @@ package migration
 import (
 	"fmt"
 
-	"github.com/lightningnetwork/lnd/channeldb/kvdb"
+	"github.com/lightningnetwork/lnd/kvdb"
 )
 
 // CreateTLB creates a new top-level bucket with the passed bucket identifier.

channeldb/migration/create_tlb_test.go

@@ -4,9 +4,9 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/lightningnetwork/lnd/channeldb/kvdb"
 	"github.com/lightningnetwork/lnd/channeldb/migration"
 	"github.com/lightningnetwork/lnd/channeldb/migtest"
+	"github.com/lightningnetwork/lnd/kvdb"
 )
 
 // TestCreateTLB asserts that a CreateTLB properly initializes a new top-level