MAINTAINERS: Add entry for Xen on KVM emulation

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 5340de0..640deb2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -443,6 +443,15 @@
 F: target/i386/sev*
 F: scripts/kvm/vmxcap
 
+Xen emulation on X86 KVM CPUs
+M: David Woodhouse <dwmw2@infradead.org>
+M: Paul Durrant <paul@xen.org>
+S: Supported
+F: include/sysemu/kvm_xen.h
+F: target/i386/kvm/xen*
+F: hw/i386/kvm/xen*
+F: tests/avocado/xen_guest.py
+
 Guest CPU Cores (other accelerators)
 ------------------------------------
 Overall