Add new toplevel 'make dist' target.

This target produces a tarball following the most recent git tag.
The tarball contains firmware binaries that have been de-duped.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

.gitignore

@@ -1 +1,3 @@
 debian/
+dist/
+release/

Makefile

@@ -12,6 +12,14 @@ check:
 	fi
 	@pre-commit run --all-files
 
+dist:
+	@mkdir -p release dist
+	./copy-firmware.sh release
+	@TARGET=linux-firmware_`git describe`.tar.gz; \
+	cd release && tar -czf ../dist/$${TARGET} *; \
+	echo "Created dist/$${TARGET}"
+	@rm -rf release
+
 install:
 	install -d $(DESTDIR)$(FIRMWAREDIR)
 	./copy-firmware.sh $(DESTDIR)$(FIRMWAREDIR)
@@ -23,3 +31,6 @@ install-xz:
 install-zst:
 	install -d $(DESTDIR)$(FIRMWAREDIR)
 	./copy-firmware.sh --zstd $(DESTDIR)$(FIRMWAREDIR)
+
+clean:
+	rm -rf release dist