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/Marvell/octeon_ebb7304/board.c b/board/Marvell/octeon_ebb7304/board.c
index 9aac5f0..e8e2d54 100644
--- a/board/Marvell/octeon_ebb7304/board.c
+++ b/board/Marvell/octeon_ebb7304/board.c
@@ -339,7 +339,7 @@
 		case CVMX_QLM_MODE_XFI:
 		case CVMX_QLM_MODE_RGMII_XFI:
 		case CVMX_QLM_MODE_RGMII_XFI_1X1:
-			type_str = "xfi";
+			type_str = "10gbase-r";
 			break;
 		case CVMX_QLM_MODE_10G_KR:
 		case CVMX_QLM_MODE_RGMII_10G_KR:
@@ -393,7 +393,7 @@
 				if (pmd_control.s.train_en)
 					type_str = "10G_KR";
 				else
-					type_str = "xfi";
+					type_str = "10gbase-r";
 				break;
 			case 4:
 				if (pmd_control.s.train_en)
@@ -618,7 +618,7 @@
 					speed[qlm] = 103125;
 			}
 			printf("QLM %d: XLAUI\n", qlm);
-		} else if (!strncmp(mode_str, "xfi", 3)) {
+		} else if (!strncmp(mode_str, "10gbase-r", 3)) {
 			bool rgmii = false;
 
 			speed[qlm] = 103125;