fpga: stratix10-soc: change FPGA indirect article to an

Change use of 'a fpga' to 'an fpga'
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20210608212350.3029742-12-trix@redhat.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/fpga/stratix10-soc.c

@@ -271,7 +271,7 @@ static int s10_send_buf(struct fpga_manager *mgr, const char *buf, size_t count)
 }
 
 /*
- * Send a FPGA image to privileged layers to write to the FPGA.  When done
+ * Send an FPGA image to privileged layers to write to the FPGA.  When done
  * sending, free all service layer buffers we allocated in write_init.
  */
 static int s10_ops_write(struct fpga_manager *mgr, const char *buf,