package/bridge-utils: bump to version 1.7

package/bridge-utils: bump to version 1.7

- Update site to get latest release
- Add a deprecated note in Config.in:
  https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/bridge-utils.git/commit/?id=ab8a2cc330253321be7bc69dea88bfaa3d48415e
- Drop patch, not needed since:
  https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/bridge-utils.git/commit/?id=7b421143d1427e17380ff5bf93ef8fc718428c83
- Update indentation in hash file (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>