config-mpi: Re-Add CONFIG_FB=y

Commit f3ba607 ("config-mpi: Disable frame buffer drivers")
removed CONFIG_FB, but we still need it for qemu vnc consoles and
together with CONFIG_FB_EFI for Nvidia graphics devices [1].

Set CONFIG_FB and CONFIG_FB_EFI.

With these set, CONFIG_VT_HW_CONSOLE_BINDING is defaulted.

[1]: https://lore.kernel.org/dri-devel/87bkf5g89v.fsf@minerva.mail-host-address-is-not-set/T/#t

config-mpi

@@ -553,7 +553,6 @@ CONFIG_USB_NET_DM9601=m
 CONFIG_INPUT_FF_MEMLESS=y
 CONFIG_INPUT_EVDEV=y
 # CONFIG_SERIO_SERPORT is not set
-CONFIG_VT_HW_CONSOLE_BINDING=y
 # CONFIG_LEGACY_PTYS is not set
 CONFIG_SERIAL_8250=y
 # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
@@ -634,6 +633,8 @@ CONFIG_DRM_MGAG200=m
 CONFIG_DRM_BOCHS=m
 CONFIG_DRM_CIRRUS_QEMU=m
 CONFIG_DRM_SIMPLEDRM=y
+CONFIG_FB=y
+CONFIG_FB_EFI=y
 CONFIG_BACKLIGHT_CLASS_DEVICE=y
 CONFIG_BACKLIGHT_APPLE=m
 CONFIG_BACKLIGHT_SAHARA=m