[libata] pata_{legacy,sc1200,sl82c105}: add missing hooks

Alan Cox noticed several hooks in pata_* drivers were missing, when
he authored his ->cable_detect hook patches.  This patch extracts
just those fixes from Alan's patches, adding the necessary hooks
(usually ->freeze, ->thaw, and ->post_internal_cmd) to the drivers.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index 58e42fb..c94504b 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -210,7 +210,10 @@
 	.exec_command	= ata_exec_command,
 	.dev_select 	= ata_std_dev_select,
 
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
 	.error_handler	= ata_bmdma_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
 
 	.bmdma_setup 	= ata_bmdma_setup,
 	.bmdma_start 	= ata_bmdma_start,