msm: vidc: fix some BW and freq calculation issues

- Modify max UBWC_CR from 3 to 5, as this value can
exceed 4 in real usecases.
- Decoder dpb read/write has already added cbcr by
dpb_factor, no need to add again.
- Decoder dpb_read BW saving factor for LLC should
be 1.3 for H264 and 1.14 for HEVC.
- VSP base cycle should be 0 for Iris/Iris2.
- Encoder ref_read_cbcr should multiply by
ref_cbcr_read_bw_factor.
- Encoder ref_write should multiply by
recon_write_bw_factor when tile enabled.
- Add fw_vpp_cycles when calculating vpp_cycles.
- Add multi-pipe factor for vpp_cycles.
- Add B-frame factor for encoder vpp_cycles.

Change-Id: I9e40203c5c89d8abdc77787a752ca240e11791f6
Signed-off-by: Qiwei Liu <qiweil@codeaurora.org>