x86/Voyager: remove MCA Kconfig quirk

Remove Voyager Kconfig quirk: just like any other hardware platform
users of Voyager systems can configure in the hardware drivers they need.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -1873,8 +1873,7 @@ config EISA
 source "drivers/eisa/Kconfig"
 
 config MCA
-	bool "MCA support" if !X86_VOYAGER
-	default y if X86_VOYAGER
+	bool "MCA support"
 	help
 	  MicroChannel Architecture is found in some IBM PS/2 machines and
 	  laptops.  It is a bus system similar to PCI or ISA. See