msm: vidc: Fix work mode settings for encoder

Currently work mode setting is erroring out for H264 and
HEVC encoder. Change the conditions for these codecs.

CRs-Fixed: 2368458
Change-Id: I8b4827b65d3fba1138fa9b153b68cd8d38fe5c5a
Signed-off-by: Vaibhav Deshu Venkatesh <vdeshuve@codeaurora.org>