[coreboot] [PATCH] The function int15 working on the Technexion's tim5690.

[Libra Li]

Hi,

The VGA BIOS is through int15 getting LCD panel ID. Then the VBIOS call
int15's "Get LCD panel ID".
    The panel ID is selection by switch.
    This function is reference "AMD RS690 ASIC Family BIOS Developer's
Guide".

Thanks.

Signed-off-by: Libra Li