msm: ipa: fix to make sure IPA clock is on

When sending holb monitoring command to uc there is a
possibility that IPA clock is off which can result in
unclocked access. Make change to enable IPA clock before
sending holb monitoring command to uc.

Change-Id: Ia8e7564372d4b4ec9f3ad35927e0d403d0695753
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Ravinder Konka <rkonka@codeaurora.org>