bts: Fix race condition in f_dyn_ipa_pdch_(de)act

Test BTS_Tests.TC_dyn_osmo_pdch_act_deact was sporadically failing due
to receiving IND_INFO on the PCU port with pdch_mask related TS bit set
to 0 after sending a PDCH ACT. That happened due to a race condition
because PCU send IND_INFO periodically. As a result, it can happen that
BTS sends an IND_INFO after PCU.clear was called and before the PDCH ACT
is handled.

Commit 446e07bc77ba2a1d08673cfeda6d4b6a72f49a77 already did same fix for
f_dyn_ipa_pdch_(de)act() family, but didn't change this one.

Change-Id: I323852632341c19837bebfcf2f00d404151367a7
1 file changed