nb/intel/sandybridge: Remove the C native graphic init

Libgfxinit provides a better alternative to the native C init. While
libgfxinit mandates an ada compiler, we want to encourage use of it
since it is in much better shape and is actually maintained.

This way libgfxinit also gets build-tested by Jenkins.

Change-Id: Ic6678d3455f1116e7e67a67b465a79df020b2399
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/27532
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/compulab/intense_pc/Kconfig

@@ -9,7 +9,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_ACPI_TABLES
 	select INTEL_INT15
 	select NORTHBRIDGE_INTEL_IVYBRIDGE
-	select SANDYBRIDGE_IVYBRIDGE_LVDS
 	select SERIRQ_CONTINUOUS_MODE
 	select SOUTHBRIDGE_INTEL_C216
 	select SYSTEM_TYPE_LAPTOP