Documentation: misc/xilinx_sdfec: eliminate duplicated word

Drop the doubled word "the".

Signed-off-by: Randy Dunlap <[e-mail]>
Acked-by: Dragan Cvetic <[e-mail]>
Cc: Jonathan Corbet <[e-mail]>
Cc: [e-mail]
Cc: Derek Kiernan <[e-mail]>
Cc: Dragan Cvetic <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/misc-devices/xilinx_sdfec.rst

···
   - open: Implements restriction that only a single file descriptor can be open per SD-FEC instance at any time
   - release: Allows another file descriptor to be open, that is after current file descriptor is closed
   - poll: Provides a method to monitor for SD-FEC Error events
-  - unlocked_ioctl: Provides the the following ioctl commands that allows the application configure the SD-FEC core:
+  - unlocked_ioctl: Provides the following ioctl commands that allows the application configure the SD-FEC core:
 
 		- :c:macro:`XSDFEC_START_DEV`
 		- :c:macro:`XSDFEC_STOP_DEV`