ARM: dts: iwg22d-sodimm-dbhd-ca: Add can1 support to HDMI DB

CAN1 interface is exposed via connector J1 found on the HDMI daughter
board. This patch enables can1 DT node from within the daughter board
specific device tree.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>