x86, MCA: Finish mca_config conversion

mce_ser, mce_bios_cmci_threshold and mce_disabled are the last three
bools which need conversion. Move them to the mca_config struct and
adjust usage sites accordingly.

Signed-off-by: Borislav Petkov <bp@alien8.de>
Acked-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 642d880..df4176c 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -1412,7 +1412,7 @@
 
 	/* We don't have features.  We have puppies!  Puppies! */
 #ifdef CONFIG_X86_MCE
-	mce_disabled = 1;
+	mca_cfg.disabled = true;
 #endif
 #ifdef CONFIG_ACPI
 	acpi_disabled = 1;