Documentation: kvm: Fix ordering
7.43 has been assigned twice, make
KVM_CAP_ARM_CACHEABLE_PFNMAP_SUPPORTED 7.44.
Fixes: f55ce5a6cd33 ("KVM: arm64: Expose new KVM cap for cacheable PFNMAP")
Reviewed-by: Ankit Agrawal <ankita@nvidia.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>