media: omap3isp: isppreview: always clamp in preview_try_format()

media: omap3isp: isppreview: always clamp in preview_try_format()

If prev->input != PREVIEW_INPUT_MEMORY the width and height weren't
clamped. Just always clamp.

This fixes a v4l2-compliance error:

	fail: v4l2-test-subdevs.cpp(171): fse.max_width == ~0U || fse.max_height == ~0U
	fail: v4l2-test-subdevs.cpp(270): ret && ret != ENOTTY
test Try VIDIOC_SUBDEV_ENUM_MBUS_CODE/FRAME_SIZE/FRAME_INTERVAL: FAIL

Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>