ssb-pcicore: Remove b44 TPS flag workaround

Now that we fixed the TPS flag assignment in commit
b63009b4
we don't need the workaround for the bcm44xx chip anymore.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>