x86: add MULTIUSER dependency for KVM

KVM tries to select 'TASKSTATS', which had additional dependencies:

warning: (KVM) selects TASKSTATS which has unmet direct dependencies (NET && MULTIUSER)

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 760433b..2688c7d 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -22,7 +22,7 @@
 	depends on HAVE_KVM
 	depends on HIGH_RES_TIMERS
 	# for TASKSTATS/TASK_DELAY_ACCT:
-	depends on NET
+	depends on NET && MULTIUSER
 	select PREEMPT_NOTIFIERS
 	select MMU_NOTIFIER
 	select ANON_INODES