Documentation/driver-api: ntb: drop doubled word

Drop the doubled word "with".

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Jonathan Corbet <[e-mail]>
Cc: [e-mail]
Cc: Jon Mason <[e-mail]>
Cc: Dave Jiang <[e-mail]>
Cc: Allen Hubbe <[e-mail]>
Cc: [e-mail]
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/driver-api/ntb.rst

···
 scratchpad and message registers. Scratchpad registers are read-and-writable
 registers that are accessible from either side of the device, so that peers can
 exchange a small amount of information at a fixed address. Message registers can
-be utilized for the same purpose. Additionally they are provided with with
+be utilized for the same purpose. Additionally they are provided with
 special status bits to make sure the information isn't rewritten by another
 peer. Doorbell registers provide a way for peers to send interrupt events.
 Memory windows allow translated read and write access to the peer memory.