Oneiric SRU (pre-stable): Fix Line out -> Speaker automute for Realtek

[David Henningsson]

SRU Justification:

Fixes a blocks-hwcert bug.

Test case:

Take the Optiplex XE machine specified here:
http://bugs.launchpad.net/bugs/882693

Without this patch:
  - Internal Speaker is not muted when "Line Out" jack is plugged in
With this patch:
  - Internal Speaker is muted when "Line Out" jack is plugged in

Upstream status:
   Acked/reviewed by Takashi Iwai and on its way to 3.0 (and 3.1) stable.

-- 
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic
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