powerpc/t4240rdb: Add alternate SerDes 2 protocol to align with RCW

SerDes 2 protocol 56 is not valid any longer due to the new RCW; protocol 55 is used instead, so add SerDes 2 protocol 55 to align with RCW.

---
 board/freescale/t4rdb/eth.c      |    2 +-
 board/freescale/t4rdb/t4_rcw.cfg |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

index 142c6a8..879bd1a 100644
@@ -101,7 +101,7 @@ int board_eth_init(bd_t *bis)
 	}
 
 #if (CONFIG_SYS_NUM_FMAN == 2)
-	if (srds_prtcl_s2 == 56) {
+	if ((srds_prtcl_s2 == 56) || (srds_prtcl_s2 == 55)) {
 		/* SGMII && XFI */
 		fm_info_set_phy_address(FM2_DTSEC1, SGMII_PHY_ADDR5);
 		fm_info_set_phy_address(FM2_DTSEC2, SGMII_PHY_ADDR6);

index fdbbe5e..e46c7b2 100644
@@ -1,7 +1,7 @@
 #PBL preamble and RCW header
 aa55aa55 010e0100
-#serdes protocol  27_56_1_9
+#serdes protocol  27_55_1_9
 16070019 18101916 00000000 00000000
-6c700848 00448c00 6c020000 f5000000
+6c6e0848 00448c00 6c020000 f5000000
 00000000 ee0000ee 00000000 000287fc
 00000000 50000000 00000000 00000028

1.7.6.5

Applied to u-boot-mpc85xx master branch, awaiting upstream.

York