util/autoport: Fix newly-added Kconfig select

Commit 4a09db75d9 ("util/autoport: Add
support for 9 Series PCHs (Lynx Point Refresh)") got submitted after
commit 01d82febb2 ("util/autoport:
Separate handling of Kconfig selects").

The latter commit was specifically made so that the former commit could
properly express a Kconfig select with a condition. However, the former
commit did not get updated, and got submitted as-is since there was no
unresolved review comment to keep track of this TODO. As a result, what
should have been a conditional Kconfig select but with the condition in
a comment to work around limitations of the original system accidentally
became a bool option override.

So, simply use the new system to express a conditional Kconfig select.
This fixes the wrongly-generated Kconfig as well as the original issue.

Even though this would still have worked, the `USE_BROADWELL_MRC` option
must be selected for boards with a Lynx Point Refresh PCH, since Haswell
MRC will not work on those PCHs. Still, this can be caught and corrected
during review, in case any board ports are made before this fix lands.

Change-Id: I98f032283e9e5bb5ec13dbff382304b7abfec07e
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91027
Reviewed-by: Nicholas <nic.c3.14@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>

util/autoport/lynxpoint.go

@@ -163,8 +163,7 @@ func (b lynxpoint) Scan(ctx Context, addr PCIDevData) {
 	}
 
 	if (b.variant == LYNX_POINT_REFRESH) {
-		KconfigBool["USE_BROADWELL_MRC"] = true
-		KconfigComment["USE_BROADWELL_MRC"] = "if !USE_NATIVE_RAMINIT # FIXME: Uncomment the if"
+		KconfigSelect["USE_BROADWELL_MRC"] = "!USE_NATIVE_RAMINIT"
 	}
 
 	FADT := ctx.InfoSource.GetACPI()["FACP"]