KVM: Fix typos in Documentation/kvm/mmu.txt

Guest memory (gpa) is part of the user address space of the process that is

Guest memory (gpa) is part of the user address space of the process that is

using kvm.  Userspace defines the translation between guest addresses and user

using kvm.  Userspace defines the translation between guest addresses and user

addresses (gpa->hva); note that two gpas may alias to the same gva, but not

addresses (gpa->hva); note that two gpas may alias to the same hva, but not

vice versa.

vice versa.

These gvas may be backed using any method available to the host: anonymous

These hvas may be backed using any method available to the host: anonymous

memory, file backed memory, and device memory.  Memory might be paged by the

memory, file backed memory, and device memory.  Memory might be paged by the

host at any time.

host at any time.