fdt: Correct condition for receiving bloblist

The condition for receiving a bloblist from TPL is reversed. This was
only noticed are the other fixes landed. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>

lib/fdtdec.c

@@ -1677,7 +1677,7 @@ int fdtdec_setup(void)
 	 */
 	if (CONFIG_IS_ENABLED(BLOBLIST) &&
 	    (xpl_prev_phase() != PHASE_TPL ||
-	     !IS_ENABLED(CONFIG_TPL_BLOBLIST))) {
+	     IS_ENABLED(CONFIG_TPL_BLOBLIST))) {
 		ret = bloblist_maybe_init();
 		if (!ret) {
 			gd->fdt_blob = bloblist_find(BLOBLISTT_CONTROL_FDT, 0);