with this diff against rk3328-evb.dtb for the 4.4 rockchip kernel i got mmc, serial console and the usb2 port working for a t9 rk3328 box (4/32g) and i think the h96max+ is similar, so maybe it will work there too - the resulting rk3328-t9.dtb and .dts are attached as well. @balbes150 if it works for others too it might be worth to include it into future rk3328 tv box images maybe.
rk3328-t9-dtb.diff
rk3328-t9.dtb
rk3328-t9.dts