mips: KVM_GUEST makes no sense for 64bit builds...

it's always been about MIPS32
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/mips/Kconfig

@@ -2182,7 +2182,7 @@ endchoice
 config KVM_GUEST
 	bool "KVM Guest Kernel"
 	depends on CPU_MIPS32_R2
-	depends on BROKEN_ON_SMP
+	depends on !64BIT && BROKEN_ON_SMP
 	help
 	  Select this option if building a guest kernel for KVM (Trap & Emulate)
 	  mode.