x86, doc: Add an entry in MAINTAINERS for arch/x86/kernel/cpu/vmware.c

Add an entry in MAINTAINERS file to reflect the maintainers of this
file.

Signed-off-by: Alok Kataria <akataria@vmware.com>
Link: http://lkml.kernel.org/r/1378284821.9739.7404.camel@akataria-dtop.eng.vmware.com


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
[ hpa: fixed tabs vs spaces ]