UBUNTU: [Debian] Use "make install" to install firmware

Upstream linux-firmware has removed symlinks from the source
tree, instead relying on Link: entries in WHENCE to generate the
symlinks at install time. Our current packaging uses rsync to
copy firmware to the install location, thus we do not get the
symlinks.

Rather than reinventing the logic to create the symlinks, use
the support already present in linux-firmware. Replace the rsync
with "make install", which is going to do a better job anyway as
we still seem to end up with some non-firmware files in
/lib/firmware. Also switch installation of files for nic-firmware
and scsi-firmware to use the install location as the source so
so that, if necessary, symlinks will be correctly installed for
those packages.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>

debian/rules

@@ -23,8 +23,9 @@ build-arch:
 
 build-indep:
 
-firm_dir = $(CURDIR)/debian/linux-firmware/lib/firmware
-doc_dir = $(CURDIR)/debian/linux-firmware/usr/share/doc/linux-firmware
+dest_dir = $(CURDIR)/debian/linux-firmware
+firm_dir = $(dest_dir)/lib/firmware
+doc_dir = $(dest_dir)/usr/share/doc/linux-firmware
 license_dir = $(doc_dir)/licenses
 nic_firm_dir = $(CURDIR)/debian/nic-firmware/lib/firmware
 scsi_firm_dir = $(CURDIR)/debian/scsi-firmware/lib/firmware
@@ -36,17 +37,14 @@ install-indep: build-indep
 
 	install -d $(firm_dir)
 
-	rsync -a --exclude=WHENCE --exclude=.git --exclude=debian --exclude=fw_source \
-		--exclude=/Makefile --exclude=check_whence.py --exclude=GPL-[23] \
-	       	* $(firm_dir)
-	find $(firm_dir) -type f -name "LICEN[CS]E*" |xargs rm
+	make install DESTDIR=$(dest_dir)
 
 	for f in $$(cat debian/nic-firmware.lst); do \
-		install -m644 -D $$f $(nic_firm_dir)/$$f; \
+		install -m644 -D $(firm_dir)/$$f $(nic_firm_dir)/$$f; \
 	done
 
 	for f in $$(cat debian/scsi-firmware.lst); do \
-		install -m644 -D $$f $(scsi_firm_dir)/$$f; \
+		install -m644 -D $(firm_dir)/$$f $(scsi_firm_dir)/$$f; \
 	done
 
 	install -d $(doc_dir)