pkg: cmsis-dsp: adapt to use pkg.mk

pkg/cmsis-dsp/Makefile

 PKG_NAME=cmsis-dsp
 PKG_URL=https://github.com/gebart/CMSIS-DSP.git
 PKG_VERSION=v1.4.5a-riot1
-PKG_DIR=$(CURDIR)/$(PKG_NAME)
 
 ifneq ($(RIOTBASE),)
 include $(RIOTBASE)/Makefile.base
 endif
 
-.PHONY: all clean patch distclean
+.PHONY: all
 
-all: $(PKG_DIR)/Makefile
-	$(MAKE) -C $(CURDIR)/$(PKG_NAME)
+all: download
+	$(MAKE) -C $(PKG_BUILDDIR)
 
-$(PKG_DIR)/Makefile: $(PKG_DIR)/.git/config
-	@
-
-$(PKG_DIR)/.git/config:
-	test -d "$(PKG_DIR)" || $(GITCACHE) clone "$(PKG_URL)" "$(PKG_VERSION)" "$(PKG_DIR)"
-
-clean::
-	@echo "Cleaning up $(PKG_NAME) package..."
-	@-cd "$(PKG_DIR)" 2> /dev/null > /dev/null && \
-		git clean -x -f && \
-		git am --abort && \
-		git reset --hard "$(PKG_VERSION)"
-
-distclean::
-	rm -rf "$(PKG_DIR)"
+include $(RIOTBASE)/pkg/pkg.mk

pkg/cmsis-dsp/Makefile.include

-INCLUDES += -I$(RIOTPKG)/cmsis-dsp/cmsis-dsp/include
+INCLUDES += -I$(BINDIR)/pkg/cmsis-dsp/include