x86/Kconfig: Simplify X86_IO_APIC dependencies

commit b1da1e71 upstream.

Since dependencies are transitive, we don't really need to
repeat those of X86_UP_IOAPIC.

Furthermore avoid the symbol getting entered into .config when
it is off by having the default simply Y and the dependencies
solely handled via the intended for that purpose "depends on".
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Link: http://lkml.kernel.org/r/54D39BC9020000780005D688@mail.emea.novell.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

arch/x86/Kconfig

@@ -894,7 +894,7 @@ config X86_LOCAL_APIC
 
 config X86_IO_APIC
 	def_bool y
-	depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC || PCI_MSI
+	depends on X86_LOCAL_APIC || X86_UP_IOAPIC
 
 config X86_VISWS_APIC
 	def_bool y