board: ti: am57xx: Add dt support for BeagleBoard-X15 revC

Add support for selecting proper dtb for
am57xx BeagleBoard X15 revC u-boot from FIT

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/ti/am57xx/board.c b/board/ti/am57xx/board.c
index 3d15cb1..f79aefd 100644
--- a/board/ti/am57xx/board.c
+++ b/board/ti/am57xx/board.c
@@ -1063,6 +1063,9 @@
 		if (board_is_x15_revb1()) {
 			if (!strcmp(name, "am57xx-beagle-x15-revb1"))
 				return 0;
+		} else if (board_is_x15_revc()) {
+			if (!strcmp(name, "am57xx-beagle-x15-revc"))
+				return 0;
 		} else if (!strcmp(name, "am57xx-beagle-x15")) {
 			return 0;
 		}