KVM: arm/arm64: Fix vGIC documentation
KVM: arm/arm64: Fix vGIC documentation

Correct some old mistakes in the API documentation:

1. VCPU is identified by index (using kvm_get_vcpu() function), but
   "cpu id" can be mistaken for affinity ID.
2. Some error codes are wrong.

  [ Slightly tweaked some grammer and did some s/CPU index/vcpu_index/
    in the descriptions.  -Christoffer ]

Signed-off-by: Pavel Fedin <8021705951b47b55cfb09d1ff23e995dd363984f@samsung.com>
Signed-off-by: Christoffer Dall <39e5ecfe2ecc327c3e39af72d8d83d1bd0709aad@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs