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/ls1046aqds/eth.c b/board/freescale/ls1046aqds/eth.c
index 33db552..2352832 100644
--- a/board/freescale/ls1046aqds/eth.c
+++ b/board/freescale/ls1046aqds/eth.c
@@ -217,13 +217,13 @@
 			/* Backplane KR mode: skip fixups */
 			printf("Interface %d in backplane KR mode\n", port);
 		} else {
-			/* XFI interface */
+			/* 10GBase-R interface */
 			f_link.phy_id = cpu_to_fdt32(port);
 			f_link.duplex = cpu_to_fdt32(1);
 			f_link.link_speed = cpu_to_fdt32(10000);
 			f_link.pause = 0;
 			f_link.asym_pause = 0;
-			/* no PHY for XFI */
+			/* no PHY for 10GBase-R */
 			fdt_delprop(fdt, offset, "phy-handle");
 			fdt_setprop(fdt, offset, "fixed-link", &f_link,
 				    sizeof(f_link));