msm: vidc: venc: set signal_info to firmware always

Currently setting signal_info, only if colorspace info
is set properly. But sometimes client can set only range.
So need to send signal_info always to firmware.

Change-Id: I5282ec01b473485ec39f39abbf7160b9c5cc0256
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>