ata: pata_pdc202xx_old: Fix some incorrectly named functions

Fixes the following W=1 kernel build warning(s):

drivers/ata/pata_pdc202xx_old.c:127: warning: expecting prototype for pdc202xx_configure_dmamode(). Prototype was for pdc202xx_set_dmamode() instead
drivers/ata/pata_pdc202xx_old.c:228: warning: expecting prototype for pdc2026x_bmdma_end(). Prototype was for pdc2026x_bmdma_stop() instead

Cc: Jens Axboe <[e-mail]>
Cc: Alan Cox <[e-mail]>
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

drivers/ata/pata_pdc202xx_old.c

···
 }
 
 /**
- *	pdc202xx_configure_dmamode	-	set DMA mode in chip
+ *	pdc202xx_set_dmamode	-	set DMA mode in chip
  *	@ap: ATA interface
  *	@adev: ATA device
  *
···
 }
 
 /**
- *	pdc2026x_bmdma_end		-	DMA engine stop
+ *	pdc2026x_bmdma_stop		-	DMA engine stop
  *	@qc: ATA command
  *
  *	After a DMA completes we need to put the clock back to 33MHz for