MAINTAINERS: use kernel.org alias

My Linaro email will stop working soon. Use @kernel.org email instead.

Signed-off-by: Dmitry Baryshkov <lumag@kernel.org>
Acked-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/641152/
Signed-off-by: Rob Clark <robdclark@chromium.org>

Author: lumag

MAINTAINERS

@@ -7380,7 +7380,7 @@ F:	include/uapi/drm/msm_drm.h
 DRM DRIVER for Qualcomm display hardware
 M:	Rob Clark <robdclark@gmail.com>
 M:	Abhinav Kumar <quic_abhinavk@quicinc.com>
-M:	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
+M:	Dmitry Baryshkov <lumag@kernel.org>
 R:	Sean Paul <sean@poorly.run>
 R:	Marijn Suijten <marijn.suijten@somainline.org>
 L:	linux-arm-msm@vger.kernel.org