kodi: revert upstream commit b6bec7a

this fixes a long standing bug with "reset pvr database" where
all pvr client addons are disabled and user must re-enable manualy


as it wont be fixed upstream before kodi final release, I am PRing it here for OE

beware, this re-introduces a very old bug. newly added PVR addons are ENABLED by default.. I cannot fix the old bug, but I still care for new regressions.

ref: https://github.com/xbmc/xbmc/pull/4761#issuecomment-52103319

if you agree to merge. I will take care to remove this patch as soon the bug is fixed upstream in I***
if not, it's fine. not too much big deal, but bug reports started to appear on kodi trac. soon or later those will start to appear here too. feel free to redirect reporters to this PR.

//cc @fritsch what you think?