msm: vidc: Update Enc/Dec o/p and i/p buffer calculations

-Fix to add 4 extra dcvs buffers at encoder input and decoder
 output side irrespective of fps and resolution.
-Decrease total encoder input buffer count from 16 to 8 for non-hfr
 use-cases.
-Increase total encoder output buffer count for hfr use-cases
 irrespective of resolution.
 

Change-Id: I2fcda6e8c93bcc0df8c3168049ebf4a60e6bb5f1
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>