rpm/Makefile: remove parameterization of Dockerfile

All images used are multi-arch now, so no need to parameterize

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 06ff3c2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 38461b5a0dc6751660c63833108dc637cf70d949
Component: packaging

Author: thaJeztah

components/packaging/rpm/Makefile

@@ -10,10 +10,6 @@ GO_IMAGE?=$(GO_BASE_IMAGE):$(GO_VERSION)-buster
 GEN_RPM_VER=$(shell ./gen-rpm-ver $(CLI_DIR) $(VERSION))
 CHOWN=docker run --rm -i -v $(CURDIR):/v -w /v alpine chown
 
-DOCKERFILE=Dockerfile
-ifdef NEEDS_ARCH_SPECIFIC
-	DOCKERFILE=Dockerfile.$(ARCH)
-endif
 ifdef BUILD_IMAGE
 	BUILD_IMAGE_FLAG=--build-arg $(BUILD_IMAGE)
 endif
@@ -22,7 +18,7 @@ BUILD?=DOCKER_BUILDKIT=1 \
 	$(BUILD_IMAGE_FLAG) \
 	--build-arg GO_IMAGE=$(GO_IMAGE) \
 	-t rpmbuild-$@/$(ARCH) \
-	-f $@/$(DOCKERFILE) \
+	-f $@/Dockerfile \
 	.
 
 SPEC_FILES?=docker-ce.spec docker-ce-cli.spec