Merge pull request #558 from stewart-ibm/disable-mlx5

disable mlx5 driver in skiroot_defconfig
diff --git a/openpower/configs/linux/skiroot_defconfig b/openpower/configs/linux/skiroot_defconfig
index bb1e33f..688524d 100644
--- a/openpower/configs/linux/skiroot_defconfig
+++ b/openpower/configs/linux/skiroot_defconfig
@@ -139,8 +139,6 @@
 CONFIG_IXGBE=m
 CONFIG_NET_VENDOR_MELLANOX=y
 CONFIG_MLX4_EN=m
-CONFIG_MLX5_CORE=m
-CONFIG_MLX5_CORE_EN=y
 CONFIG_MYRI10GE=m
 CONFIG_QLGE=m
 CONFIG_NETXEN_NIC=m