scsi: move non-emulation specific code to scsi/

util/scsi.c includes some SCSI code that is shared by block/iscsi.c and
hw/scsi, but the introduction of the persistent reservation helper
will add many more instances of this.  There is also include/block/scsi.h,
which actually is not part of the core block layer.

The persistent reservation manager will also need a home.  A scsi/
directory provides one for both the aforementioned shared code and
the PR manager code.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index c207cb0..2dbb9ec 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1215,6 +1215,13 @@
 F: include/block/aio.h
 T: git git://github.com/stefanha/qemu.git block
 
+Block SCSI subsystem
+M: Paolo Bonzini <pbonzini@redhat.com>
+L: qemu-block@nongnu.org
+S: Supported
+F: include/scsi/*
+F: scsi/*
+
 Block Jobs
 M: Jeff Cody <jcody@redhat.com>
 L: qemu-block@nongnu.org