ARM: dts: r8a7745: Enable DMA for HSUSB

From: Biju Das <biju.das@bp.renesas.com>

This patch adds DMA properties to the HSUSB node.

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