xen/pvh: Do not fill kernel's e820 map in init_pvh_bootparams()

xen/pvh: Do not fill kernel's e820 map in init_pvh_bootparams()

e820 map is updated with information from the zeropage (i.e. pvh_bootparams)
by default_machine_specific_memory_setup(). With the way things are done
now,  we end up with a duplicated e820 map.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
OraBug: 26662731

(cherry picked from commit 5f6a1614fab801834e32b420b60acdc27acfcdec)
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Conflicts:
	arch/x86/xen/enlighten_pvh.c
	(No enlighten_pvh.c in our tree)