kontron/mal10: Undo set primary GPU via FSP option

This is no longer needed, since now this parameter is already set using
the ONBOARD_VGA_IS_PRIMARY config [1].

[1] commit 1a4496e79f

Change-Id: Ie1bd62ecba2155af5c94f043ea7531f32989588f
Signed-off-by: Maxim Polyakov <max.senia.poliak@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56517
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/kontron/mal10/romstage.c

@@ -22,6 +22,4 @@ void mainboard_memory_init_params(FSPM_UPD *mupd)
 	mupd->FspmConfig.MsgLevelMask  = 0;
 	mupd->FspmConfig.MrcDataSaving = 0;
 	mupd->FspmConfig.MrcFastBoot   = 1;
-
-	mupd->FspmConfig.PrimaryVideoAdaptor = 2;
 }