msm:vidc: Fix klockwork errors in video driver.

-- Array members of 'binfo' of size 8 may use index value(s) 8..INT_MAX
-- Suspicious dereference of pointer 'b' by passing argument 1 to function
   'is_dynamic_output_buffer_mode'

Signed-off-by: Vasantha Balla <vballa@codeaurora.org>
Change-Id: Ie86b516729023d26131dd37bf330c642d38d4dc5