common: cleanup

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
ipu: blitter: moved interlace flag setting to the blit() call

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
ipu: videotransform: extra checks to handle passthrough cases properly

This improves performance and avoids calling the IPU with identical
input and output parameters (which is considered an error by the IPU
kernel driver)

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>