scsi: docs: convert scsi_eh.txt to ReST

Link: https://lore.kernel.org/r/300314197f2e6a3258200711e825aa04c9e8ceaf.1583136624.git.mchehab+huawei@kernel.orgSigned-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Documentation/driver-api/libata.rst

@@ -401,7 +401,7 @@ Error handling
 ==============
 
 This chapter describes how errors are handled under libata. Readers are
-advised to read SCSI EH (Documentation/scsi/scsi_eh.txt) and ATA
+advised to read SCSI EH (Documentation/scsi/scsi_eh.rst) and ATA
 exceptions doc first.
 
 Origins of commands

Documentation/scsi/index.rst

@@ -32,5 +32,6 @@ Linux SCSI Subsystem
    ppa
    qlogicfas
    scsi-changer
+   scsi_eh
 
    scsi_transport_srp/figures