msm: ipa4: initialize IPAHAL at ipa_pre_init()

At virtual platforms, SMMU is not used so IPA HAL
initialization can be done during ipa_pre_init() instead
of ipa_post_init().
IPAHAL need to be initialized at ipa_pre_init() on
virtual platforms as it is used to load IPA firmwares.

CRx-fixed: 2266802
Change-Id: I00201ab6386639ede06a7ba9ac022834f5244e56
Signed-off-by: Ghanim Fodi <gfodi@codeaurora.org>