MAINTAINERS: Add Cameron as HVF co-maintainer

Similar patch was sent a while ago but got lost.
While at it, add a status wiki page.

Cc: Cameron Esfahani <dirty@apple.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20200624225850.16982-9-r.bolshakov@yadro.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

MAINTAINERS

@@ -417,7 +417,9 @@ F: target/i386/kvm.c
 F: scripts/kvm/vmxcap
 
 X86 HVF CPUs
+M: Cameron Esfahani <dirty@apple.com>
 M: Roman Bolshakov <r.bolshakov@yadro.com>
+W: https://wiki.qemu.org/Features/HVF
 S: Maintained
 F: accel/stubs/hvf-stub.c
 F: target/i386/hvf/