ucc_geth: Add 16 bytes to max TX frame for VLANs

Creating a VLAN interface on top of ucc_geth adds 4 bytes
to the frame and the HW controller is not prepared to
TX a frame bigger than 1518 bytes which is 4 bytes too
small for a full VLAN frame. Add 16 bytes which will handle
the a simple VLAN and leaves 12 bytes for future expansion.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/ucc_geth.c

@@ -116,10 +116,10 @@ static struct ucc_geth_info ugeth_primary_info = {
 	.maxGroupAddrInHash = 4,
 	.maxIndAddrInHash = 4,
 	.prel = 7,
-	.maxFrameLength = 1518,
+	.maxFrameLength = 1518+16, /* Add extra bytes for VLANs etc. */
 	.minFrameLength = 64,
-	.maxD1Length = 1520,
-	.maxD2Length = 1520,
+	.maxD1Length = 1520+16, /* Add extra bytes for VLANs etc. */
+	.maxD2Length = 1520+16, /* Add extra bytes for VLANs etc. */
 	.vlantype = 0x8100,
 	.ecamptr = ((uint32_t) NULL),
 	.eventRegMask = UCCE_OTHER,