KVM: Clarify meaning of hva_to_pfn()'s 'atomic' parameter

The current description can be read as "atomic -> allowed to sleep,"
when in fact the intended statement is "atomic -> NOT allowed to sleep."
Make that clearer in the docstring.
Signed-off-by: Anish Moorthy <amoorthy@google.com>
Link: https://lore.kernel.org/r/20240215235405.368539-2-amoorthy@google.comSigned-off-by: Sean Christopherson <seanjc@google.com>

virt/kvm/kvm_main.c

@@ -2963,7 +2963,7 @@ static int hva_to_pfn_remapped(struct vm_area_struct *vma,
 /*
  * Pin guest page in memory and return its pfn.
  * @addr: host virtual address which maps memory to the guest
- * @atomic: whether this function can sleep
+ * @atomic: whether this function is forbidden from sleeping
  * @interruptible: whether the process can be interrupted by non-fatal signals
  * @async: whether this function need to wait IO complete if the
  *         host page is not in the memory