package/dpdk: install to staging

It will be needed for the upcoming user packages
that will use the DPDK.

Signed-off-by: Vincent Jardin <vjardin@free.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/dpdk/dpdk.mk

@@ -35,6 +35,8 @@ DPDK_LICENSE_FILES = \
 	license/exceptions.txt \
 	license/mit.txt
 
+DPDK_INSTALL_STAGING = YES
+
 DPDK_DEPENDENCIES = \
 	host-pkgconf \
 	host-python-pyelftools