media: venus: vdec: Make decoder return LAST flag for sufficient event

[ Upstream commit a4ca67af ]

This makes the decoder to behaives equally for sufficient and
insufficient events. After this change the LAST buffer flag will be set
when the new resolution (in dynamic-resolution-change state) is smaller
then the old bitstream resolution.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Stable-dep-of: 50248ad9 ("media: venus: dec: Fix handling of the start cmd")
Signed-off-by: Sasha Levin <sashal@kernel.org>