board: am57xx: fit: add support for selecting dtb dynamically

FIT allows for a multiple dtb in a single image. SPL needs away to
detect the right dtb to be used. Adding support for the same for am57xx
platforms.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

board/ti/am57xx/board.c

@@ -736,3 +736,15 @@ int ft_board_setup(void *blob, bd_t *bd)
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_SPL_LOAD_FIT
+int board_fit_config_name_match(const char *name)
+{
+	if (board_is_x15() && !strcmp(name, "am57xx-beagle-x15"))
+		return 0;
+	else if (board_is_am572x_evm() && !strcmp(name, "am57xx-beagle-x15"))
+		return 0;
+	else
+		return -1;
+}
+#endif