drm/bridge: dw-hdmi-qp: Rework AVI InfoFrame handler

drm/bridge: dw-hdmi-qp: Rework AVI InfoFrame handler

Make use of the recently introduced dw_hdmi_qp_write_infoframe() helper
to simplify the writing of the Auxiliary Video InfoFrame (AVI) packet
header and body registers.

Moreover, since now having dedicated callbacks per InfoFrame type, move
the implementation to dw_hdmi_qp_bridge_write_avi_infoframe() and drop
dw_hdmi_qp_config_avi_infoframe().

While at it, also discard the superfluous infoframe size verification.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Link: https://patch.msgid.link/20260129-dw-hdmi-qp-iframe-v2-3-0157ad05232c@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>