msm: vidc: disable Hier-P when LTR is enabled

Hier-P and LTR are mutually exclusive in firmware. Disable Hier-P
using HFI_PROPERTY_PARAM_VENC_HIER_P_MAX_NUM_ENH_LAYER
instead of HFI_PROPERTY_CONFIG_VENC_HIER_P_ENH_LAYER.

Change-Id: Ib4eb053a0ccef94c1996392eba19c5b83f7c9971
Signed-off-by: Arun Menon <avmenon@codeaurora.org>