exynos/fimg2d: simplify base address submission in g2d_scale_and_blend()

Use g2d_add_base_addr() for source and destination base
address just like all other calls.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>