media: nxp: imx8-isi: Refine code by using helper macro

media: nxp: imx8-isi: Refine code by using helper macro

Make code more readable and easier to maintain by using the FIELD_PREP
and GENMASK() macros.

While at it, replace spaces with tabs for macro indentation.

No functional changes.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Guoniu Zhou <guoniu.zhou@nxp.com>
Link: https://patch.msgid.link/20250905-isi_imx93-v2-2-37db5f768c57@nxp.com
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>