KVM: SEV: Use to_kvm_sev_info() for fetching kvm_sev_info struct

Simplify code by replacing &to_kvm_svm(kvm)->sev_info with
to_kvm_sev_info() helper function. Wherever possible, drop the local
variable declaration and directly use the helper instead.

No functional changes.

Signed-off-by: Nikunj A Dadhania <[email protected]>
Reviewed-by: Pavan Kumar Paluri <[email protected]>
Reviewed-by: Pankaj Gupta <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>

Author: nikunjad