drivers/edac: add dev_name getter function

Move dev_name() macro to a more generic interface since it's not possible
to determine whether a device is pci, platform, or of_device easily.

Now each low level driver sets the name into the control structure, and
the EDAC core references the control structure for the information.

Better abstraction.

Signed-off-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Douglas Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/edac/e752x_edac.c b/drivers/edac/e752x_edac.c
index 9460edd3..10f8499 100644
--- a/drivers/edac/e752x_edac.c
+++ b/drivers/edac/e752x_edac.c
@@ -1004,6 +1004,7 @@
 
 	debugf3("%s(): more mci init\n", __func__);
 	mci->ctl_name = pvt->dev_info->ctl_name;
+	mci->dev_name = pci_name(pdev);
 	mci->edac_check = e752x_check;
 	mci->ctl_page_to_phys = ctl_page_to_phys;