[coreboot] camelback mountain CRB graphics support + UefiPayload

[Moorthi M.s]

Hi,

We are developing coreboot along with UefiPayload for camelback mountain
crb.

The processor doesn't have the inbuilt graphics support. Add-on graphics
card is used in the CRB.

Graphics is initialised and working with SeaBios as payload.

But when we configured to use UefiPayload, shell and boot options are not
visible in graphics display. A cursor is blinking in the display and the
shell is visible in the UART console.

Is there any configuration required for UefiPayload with respect to
graphics?

Thanks & regards,
Moorthi