media: MAINTAINERS: Add "qcom," substring for Qualcomm Camera Subsystem

Commit f5502cd2 ("media: dt-bindings: Add JH7110 Camera Subsystem")
adds the StarFive Camera Subsystem parts, also complies with Qualcomm's
rules. Add "qcom," substring restrcting this condition.

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
[Sakari Ailus: Add media: prefix to the subject.]
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>