kvm: x86: fix two typos in comment

s/drity/dirty and s/vmsc01/vmcs01

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 045d592..bdd1acba 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1174,7 +1174,7 @@
  * Write-protect on the specified @sptep, @pt_protect indicates whether
  * spte write-protection is caused by protecting shadow page table.
  *
- * Note: write protection is difference between drity logging and spte
+ * Note: write protection is difference between dirty logging and spte
  * protection:
  * - for dirty logging, the spte can be set to writable at anytime if
  *   its dirty bitmap is properly set.