ata: pata_arasan: Staticize local symbols

These local symbols are used only in this file.
Fix the following sparse warnings:

drivers/ata/pata_arasan_cf.c:657:6: warning: symbol 'arasan_cf_error_handler' was not declared. Should it be static?
drivers/ata/pata_arasan_cf.c:686:14: warning: symbol 'arasan_cf_qc_issue' was not declared. Should it be static?
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/pata_arasan_cf.c

@@ -654,7 +654,7 @@ static void arasan_cf_freeze(struct ata_port *ap)
 	ata_sff_freeze(ap);
 }
 
-void arasan_cf_error_handler(struct ata_port *ap)
+static void arasan_cf_error_handler(struct ata_port *ap)
 {
 	struct arasan_cf_dev *acdev = ap->host->private_data;
 
@@ -683,7 +683,7 @@ static void arasan_cf_dma_start(struct arasan_cf_dev *acdev)
 	ata_sff_queue_work(&acdev->work);
 }
 
-unsigned int arasan_cf_qc_issue(struct ata_queued_cmd *qc)
+static unsigned int arasan_cf_qc_issue(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 	struct arasan_cf_dev *acdev = ap->host->private_data;