EDAC, altera: Abstract ECC Enable Mask in check_deps()

In preparation for the Arria10 peripheral ECCs, use the ECC Enable mask
in place of hard coded masks in the check dependency functions.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Cc: devicetree@vger.kernel.org
Cc: dinguyen@opensource.altera.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux@arm.linux.org.uk
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1458576106-24505-5-git-send-email-tthayer@opensource.altera.com
Signed-off-by: Borislav Petkov <bp@suse.de>

drivers/edac/altera_edac.c

@@ -859,7 +859,9 @@ static void ocram_free_mem(void *p, size_t size, void *other)
 static int altr_ocram_check_deps(struct altr_edac_device_dev *device)
 {
 	void __iomem  *base = device->base;
-	if (readl(base) & ALTR_OCR_ECC_EN)
+	const struct edac_device_prv_data *prv = device->data;
+
+	if (readl(base) & prv->ecc_enable_mask)
 		return 0;
 
 	edac_printk(KERN_ERR, EDAC_DEVICE,
@@ -926,7 +928,10 @@ static void l2_free_mem(void *p, size_t size, void *other)
 static int altr_l2_check_deps(struct altr_edac_device_dev *device)
 {
 	void __iomem *base = device->base;
-	if (readl(base) & ALTR_L2_ECC_EN)
+	const struct edac_device_prv_data *prv = device->data;
+
+	if ((readl(base) & prv->ecc_enable_mask) ==
+	     prv->ecc_enable_mask)
 		return 0;
 
 	edac_printk(KERN_ERR, EDAC_DEVICE,