MAINTAINERS: add drm_bridge for drm bridge maintainers

MAINTAINERS: add drm_bridge for drm bridge maintainers

Otherwise core changes don't get noticed by the right people. I
noticed this because a patch set from Jagan Teki seems to have fallen
through the cracks.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Robert Foss <rfoss@kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
[narmstrong: fixed ordering & Daniel's SoB]
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230412080921.10171-1-daniel.vetter@ffwll.ch