video: Fix line padding calculation for 16 and 24 bpp bitmaps

video: Fix line padding calculation for 16 and 24 bpp bitmaps

The line size in the bitmap file is multiple of 4 bytes. In current code
the complement of row size to a multiple of 4 bytes is further unnecessarily
multiplied by the pixel size. This result in incorrect displaying of bitmaps
with image width which is not multiple of 4 pixels. Fix this by removing
the unnecessary multiplication.

Tested with 24BPP bitmap and XRGB32 display.

Change-Id: I9bd307780e388a70f47823444fe3ecdf910d08fb
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>