mkimage: simplify fit_check_params()

fit_check_params() wants at least two of dflag, fflag, and lflag set.

Simplify the logical constraint checking this.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/tools/fit_image.c b/tools/fit_image.c
index 114df5a..6aa4b1c 100644
--- a/tools/fit_image.c
+++ b/tools/fit_image.c
@@ -825,9 +825,9 @@
 {
 	if (params->auto_its)
 		return 0;
-	return	((params->dflag && (params->fflag || params->lflag)) ||
-		(params->fflag && (params->dflag || params->lflag)) ||
-		(params->lflag && (params->dflag || params->fflag)));
+	return	((params->dflag && params->fflag) ||
+		 (params->fflag && params->lflag) ||
+		 (params->lflag && params->dflag));
 }
 
 U_BOOT_IMAGE_TYPE(