RSL_Types: Fix msg_disc of IPA PDCH ACT/DEACT + inverse templates

The MDISC_IPACCESS is only used for the media (CRCX/MDCX/DLCX) related
commands, not for the PDCH activation/deactivation.  The latter uses
normal MDISC_DCHAN.

Also, add the inverse templates for PDCH actiation/deactivation, so we
now have both receive and transmit template for each of the 6 related
messages (activation, deactivation, plus each their ACK + NACK).

Change-Id: I170a90391859d71e1f96a72205487cccba5b6ae7
1 file changed