KVM: Fix some comment typos and missing parentheses

Fix some typos and add missing parentheses in the comments.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 679692b..ea402e7 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -969,7 +969,7 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
  * - For single-destination interrupts, handle it in posted mode
  * - Else if vector hashing is enabled and it is a lowest-priority
  *   interrupt, handle it in posted mode and use the following mechanism
- *   to find the destinaiton vCPU.
+ *   to find the destination vCPU.
  *	1. For lowest-priority interrupts, store all the possible
  *	   destination vCPUs in an array.
  *	2. Use "guest vector % max number of destination vCPUs" to find