[coreboot] [PATCH] SeaBIOS - vgahooks improvements

[Rudolf Marek]

Hello all,

The K8M890 BIOS needs int 0x15 0x5f18 to write to scratch register for a driver 
the memory size of framebuffer and also the memory speed. The X.org openchrome 
driver as well Unichrome driver needs that.

Signed-off-by: Rudolf Marek

Thanks,
Rudolf