scsi: docs: convert sym53c500_cs.txt to ReST

Link: https://lore.kernel.org/r/eff616[e-mail]
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

Documentation/scsi/index.rst

···
    sd-parameters
    smartpqi
    st
+   sym53c500_cs
 
    scsi_transport_srp/figures

Documentation/scsi/sym53c500_cs.txt Documentation/scsi/sym53c500_cs.rst

···
+.. SPDX-License-Identifier: GPL-2.0
+
+=======================
+The sym53c500_cs Driver
+=======================
+
 The sym53c500_cs driver originated as an add-on to David Hinds' pcmcia-cs
 package, and was written by Tom Corner ([e-mail]).  A rewrite was
 long overdue, and the current version addresses the following concerns:
···
 version of this driver, and I guess it worked for those users.  It worked
 for Tom Corner, and it works for me.  Your mileage will probably vary.
 
---Bob Tracy ([e-mail])
+Bob Tracy ([e-mail])