sata_promise: fix 20619 new EH merge error

When I merged my 20619 new EH conversion with #libata-upstream
I had to manually resolve a conflict, and inadvertently lost
pdc_pata_ops' ->post_internal_cmd binding. Corrected by this patch.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/sata_promise.c

@@ -218,6 +218,7 @@ static const struct ata_port_operations pdc_pata_ops = {
 	.freeze			= pdc_freeze,
 	.thaw			= pdc_thaw,
 	.error_handler		= pdc_error_handler,
+	.post_internal_cmd	= pdc_post_internal_cmd,
 	.data_xfer		= ata_data_xfer,
 	.irq_handler		= pdc_interrupt,
 	.irq_clear		= pdc_irq_clear,