MAINTAINERS: remove file pattern from KERNEL VIRTUAL MACHINE (KVM) FOR AMD-V

Commit 6c8166a7 ("KVM: SVM: Fold kvm_svm.h
info svm.c") folded this file away.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>