MAINTAINERS: Update PARAVIRT_OPS_INTERFACE and VMWARE_HYPERVISOR_INTERFACE

Thomas Hellstrom will be handing over VMware's maintainership of these
interfaces to Deep Shah.

Signed-off-by: Deep Shah <sdeep@vmware.com>
Acked-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20200416234520.GA1700@prme-mon-cfl-mlw-07
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>