MAINTAINERS: drop AMD SVM and Intel VT-x sections

We'd like to thank the VT-x maintainers for their past contributions,
while at the same time we'd like to reflect reality as it has been for
quite some time. Have VT-x maintainership (and for symmetry also AMD
SVM's) fall back to general x86.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>

MAINTAINERS

@@ -226,13 +226,6 @@ M:	Andrew Cooper <andrew.cooper3@citrix.com>
 S:	Maintained
 F:	xen/drivers/passthrough/amd/
 
-AMD SVM
-M:	Jan Beulich <jbeulich@suse.com>
-M:	Andrew Cooper <andrew.cooper3@citrix.com>
-S:	Supported
-F:	xen/arch/x86/hvm/svm/
-F:	xen/arch/x86/cpu/vpmu_amd.c
-
 ARGO
 M:	Christopher Clark <christopher.w.clark@gmail.com>
 S:	Maintained
@@ -363,15 +356,6 @@ M:	Kevin Tian <kevin.tian@intel.com>
 S:	Supported
 F:	xen/drivers/passthrough/vtd/
 
-INTEL(R) VT FOR X86 (VT-X)
-M:	Jun Nakajima <jun.nakajima@intel.com>
-M:	Kevin Tian <kevin.tian@intel.com>
-S:	Supported
-F:	xen/arch/x86/cpu/vpmu_intel.c
-F:	xen/arch/x86/hvm/vmx/
-F:	xen/arch/x86/include/asm/hvm/vmx/
-F:	xen/arch/x86/mm/p2m-ept.c
-
 IOMMU VENDOR INDEPENDENT CODE
 M:	Jan Beulich <jbeulich@suse.com>
 M:	Paul Durrant <paul@xen.org>