x86/svm: Drop svm_vm{load,save}() helpers

x86/svm: Drop svm_vm{load,save}() helpers

Following on from c/s 7d161f6537 "x86/svm: Fix svm_vmcb_dump() when used in
current context", there is now only a single user of svm_vmsave() remaining in
the tree, with all users moved to svm_vm{load,save}_pa().

nv->nv_n1vmcx has a matching nv->nv_n1vmcx_pa which is always correct, and
avoids a redundant __pa() translation behind the scenes.

With this gone, all VM{LOAD,SAVE} operations are using paddr_t's which is more
efficient, so drop the svm_vm{load,save}() helpers to avoid uses of them
reappearing in the future.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Brian Woods <brian.woods@amd.com>