net: replace the "xfi" phy-mode with "10gbase-r"

As part of the effort of making U-Boot work with the same device tree as
Linux, there is an issue with the "xfi" phy-mode. To be precise, in
Linux there was a discussion (for those who have time to read:
https://lore.kernel.org/netdev/1576768881-24971-2-git-send-email-madalin.bucur@oss.nxp.com/)

which led to a patch:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=c114574ebfdf42f826776f717c8056a00fa94881

TL;DR: "xfi" was standardized in Linux as "10gbase-r".

This patch changes the relevant occurrences in U-Boot to use "10gbase-r"
instead of "xfi" wherever applicable.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/board/freescale/ls1043ardb/eth.c b/board/freescale/ls1043ardb/eth.c
index 1f01c15..fa59116 100644
--- a/board/freescale/ls1043ardb/eth.c
+++ b/board/freescale/ls1043ardb/eth.c
@@ -65,7 +65,7 @@
 	for (i = FM1_DTSEC1; i < FM1_DTSEC1 + CONFIG_SYS_NUM_FM1_DTSEC; i++)
 		fm_info_set_mdio(i, dev);
 
-	/* XFI on lane A, MAC 9 */
+	/* 10GBase-R on lane A, MAC 9 */
 	fm_info_set_phy_address(FM1_10GEC1, FM1_10GEC1_PHY_ADDR);
 	dev = miiphy_get_dev_by_name(DEFAULT_FM_TGEC_MDIO_NAME);
 	fm_info_set_mdio(FM1_10GEC1, dev);