dt-bindings: media: mediatek-jpeg-encoder: change max iommus count

dt-bindings: media: mediatek-jpeg-encoder: change max iommus count

MT8186 has 4 iommus in the list, to cope with this situation, adjust
the maxItems to 4 (instead of previous 2).
Add also minItems as 2 to keep compatibility with current devices.

Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240127084258.68302-1-eugen.hristev@collabora.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>