Documentation/driver-api: nvdimm: drop doubled word

Drop the doubled word "to".
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20200704034502.17199-14-rdunlap@infradead.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/driver-api/nvdimm/nvdimm.rst

@@ -73,7 +73,7 @@ DAX:
   process address space.
 
 DSM:
-  Device Specific Method: ACPI method to to control specific
+  Device Specific Method: ACPI method to control specific
   device - in this case the firmware.
 
 DCR: