properly ignore in git files generated and modified by 'make dkms'

- Add VERSION to .gitignore
- Changes made by make in dkms.conf triggered 'uncommited changes'
  because being in the repository it is considered by git as a versioned
  file regardless of .gitignore. So:
-- Rename dkms.conf to dkms.conf.am, indicating it is a template and
   effectively removing dkms.conf from the repository
-- Copy dkms.conf.am to dkms.conf during 'make dkms'

.gitignore

@@ -6,4 +6,5 @@
 Module.symvers
 modules.order
 .tmp_versions
-dkms.conf
+dkms.conf
+VERSION

Makefile

@@ -88,6 +88,7 @@ endif
 	depmod -a -F $(SYSTEM_MAP) $(TARGET)
 
 dkms:
+	@cp  `pwd`/dkms.conf.am `pwd`/dkms.conf
 	@sed -i -e '/^PACKAGE_VERSION=/ s/=.*/=\"$(DRIVER_VERSION)\"/' dkms.conf
 	@echo "$(DRIVER_VERSION)" >VERSION
 	@mkdir $(DKMS_ROOT_PATH)