allow export image name and registry name

andyzhangx · andyzhangx · commit c3a966251348 · 2020-11-26T08:00:45.000Z
revert part of change
diff --git a/build.make b/build.make
@@ -20,7 +20,7 @@
 
 # This is the default. It can be overridden in the main Makefile after
 # including build.make.
-REGISTRY_NAME=quay.io/k8scsi
+REGISTRY_NAME?=quay.io/k8scsi
 
 # Can be set to -mod=vendor to ensure that the "vendor" directory is used.
 GOFLAGS_VENDOR=
