KVM: Replaces symbolic permissions with numeric

Replaces "S_IRUGO | S_IWUSR" with 0644. The reason is that symbolic
permissions considered harmful:
https://lwn.net/Articles/696229/Signed-off-by: Roman Storozhenko <romeusmeister@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

virt/kvm/kvm_main.c

@@ -73,17 +73,17 @@ MODULE_LICENSE("GPL");
 
 /* Architectures should define their poll value according to the halt latency */
 unsigned int halt_poll_ns = KVM_HALT_POLL_NS_DEFAULT;
-module_param(halt_poll_ns, uint, S_IRUGO | S_IWUSR);
+module_param(halt_poll_ns, uint, 0644);
 EXPORT_SYMBOL_GPL(halt_poll_ns);
 
 /* Default doubles per-vcpu halt_poll_ns. */
 unsigned int halt_poll_ns_grow = 2;
-module_param(halt_poll_ns_grow, uint, S_IRUGO | S_IWUSR);
+module_param(halt_poll_ns_grow, uint, 0644);
 EXPORT_SYMBOL_GPL(halt_poll_ns_grow);
 
 /* Default resets per-vcpu halt_poll_ns . */
 unsigned int halt_poll_ns_shrink;
-module_param(halt_poll_ns_shrink, uint, S_IRUGO | S_IWUSR);
+module_param(halt_poll_ns_shrink, uint, 0644);
 EXPORT_SYMBOL_GPL(halt_poll_ns_shrink);
 
 /*