fdtdump: Fix over-zealous version check

It's perfectly valid for a dtb to have version and last compat version set
to the same value, and that value can be 17 (the latest defined version).
However, since 0931cea "dtc: fdtdump: check fdt if not in scanning mode"
fdtdump will refuse to process such a dtb.  We get away with this in many
cases because dtc's typical output has last compat version equal to 16,
rather than 17, but it's still a bug.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

fdtdump.c

@@ -165,7 +165,7 @@ static bool valid_header(char *p, off_t len)
 	if (len < sizeof(struct fdt_header) ||
 	    fdt_magic(p) != FDT_MAGIC ||
 	    fdt_version(p) > MAX_VERSION ||
-	    fdt_last_comp_version(p) >= MAX_VERSION ||
+	    fdt_last_comp_version(p) > MAX_VERSION ||
 	    fdt_totalsize(p) >= len ||
 	    fdt_off_dt_struct(p) >= len ||
 	    fdt_off_dt_strings(p) >= len)