update MAINTAINERS file

There have been some "organizational changes" within AMD.
Update the MAINTAINERS file accordingly.
Please also feel free to use the new email addresses if there are
any inquires related to code authored by Wei Wang, Christoph Egger
or Andre Przywara.

Signed-off-by: Andre Przywara <osp@andrep.de>
Acked-by: Wei Wang <weiwang.dd@gmail.com>
Acked-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Acked-by: Wei Huang <wei.huang2@amd.com>
Acked-by: Christoph Egger <Christoph_Egger@gmx.de>
Committed-by: Keir Fraser <keir@xen.org>

MAINTAINERS

@@ -78,7 +78,6 @@ Maintainers List (try to look for most precise areas first)
 ACPI & POWER MANAGEMENT
 M:	Winston Wang <winston.l.wang@intel.com>
 M:	Gang Wei <gang.wei@intel.com>
-M:	Mark Langsdorf <mark.langsdorf@amd.com>
 M:	Jan Beulich <jbeulich@suse.com>
 S:	Supported
 F:	xen/arch/x86/acpi/
@@ -86,13 +85,15 @@ F:	xen/drivers/acpi/
 F:	xen/drivers/cpufreq/
 
 AMD IOMMU
-M:	Wei Wang <wei.wang2@amd.com>
-S:	Supported
+M:	Wei Wang <weiwang.dd@gmail.com>
+M:	Wei Huang <wei.huang2@amd.com>
+S:	Maintained
 F:	xen/drivers/passthrough/amd/
 
 AMD SVM
-M:	Andre Przywara <andre.przywara@amd.com>
-M:	Christoph Egger <christoph.egger@amd.com>
+M:	Andre Przywara <osp@andrep.de>
+M:	Christoph Egger <Christoph_Egger@gmx.de>
+M:	Boris Ostrovsky <boris.ostrovsky@amd.com>
 M:	Wei Huang <wei.huang2@amd.com>
 S:	Supported
 F:	xen/arch/x86/hvm/svm/
@@ -170,7 +171,7 @@ S:	Supported
 T:	hg http://xenbits.xen.org/XCP/linux-2.6.*.pq.hg
 
 MACHINE CHECK (MCA) & RAS
-M:	Christoph Egger <christoph.egger@amd.com>
+M:	Christoph Egger <Christoph_Egger@gmx.de>
 M:	Yunhong Jiang <yunhong.jiang@intel.com>
 S:	Supported
 F:	xen/arch/x86/cpu/mcheck/