amd64_edac: misc small cleanups

- cleanup debug calls
- shorten function names
- cleanup error exit paths

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index a159957..ba73015 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -444,7 +444,7 @@
 #define K8_MSR_MC4ADDR			0x0412
 
 /* AMD sets the first MC device at device ID 0x18. */
-static inline int get_mc_node_id_from_pdev(struct pci_dev *pdev)
+static inline int get_node_id(struct pci_dev *pdev)
 {
 	return PCI_SLOT(pdev->devfn) - 0x18;
 }