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/t102xrdb/eth_t102xrdb.c b/board/freescale/t102xrdb/eth_t102xrdb.c
index 56e6109..b28c545 100644
--- a/board/freescale/t102xrdb/eth_t102xrdb.c
+++ b/board/freescale/t102xrdb/eth_t102xrdb.c
@@ -64,7 +64,7 @@
 		/* set the on-board RGMII2  PHY */
 		fm_info_set_phy_address(FM1_DTSEC3, RGMII_PHY2_ADDR);
 
-		/* set 10G XFI with Aquantia AQR105 PHY */
+		/* set 10GBase-R with Aquantia AQR105 PHY */
 		fm_info_set_phy_address(FM1_10GEC1, FM1_10GEC1_PHY_ADDR);
 		break;
 #endif