board/ls2080qds: Fix typo in README for QSGMII riser card

DPMACx to PHY mapping for SGMII is mentioned as QSGMII.

So fix typo in README for QSGMII rise card.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
[York Sun: Change from ls2085aqds to ls2080aqds]
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/ls2080aqds/README b/board/freescale/ls2080aqds/README
index a4abb7e..375e97c 100644
--- a/board/freescale/ls2080aqds/README
+++ b/board/freescale/ls2080aqds/README
@@ -172,7 +172,7 @@
 #define XQSGMII_CARD_PHY4_PORT0_ADDR 0xc
 #define XQSGMII_CARD_PHY4_PORT2_ADDR 0xe
 
-Mapping DPMACx to PHY during QSGMII
+Mapping DPMACx to PHY during SGMII
 DPMAC1 -> PHY1-P0
 DPMAC2 -> PHY2-P0
 DPMAC3 -> PHY3-P0