Merge pull request #1213 from masahir0y/uniphier

uniphier: clean-up platform makefile
diff --git a/plat/socionext/uniphier/platform.mk b/plat/socionext/uniphier/platform.mk
index 41d0444..f99bbf5 100644
--- a/plat/socionext/uniphier/platform.mk
+++ b/plat/socionext/uniphier/platform.mk
@@ -117,4 +117,4 @@
 bl1_gzip: $(BUILD_PLAT)/bl1.bin.gzip
 %.gzip: %
 	@echo "  GZIP    $@"
-	$(Q)(cat $< | gzip -n -f -9 > $@) || (rm -f $@ || false)
+	$(Q)gzip -n -f -9 $< --stdout > $@