EDAC, fsl: Move error injection under CONFIG_EDAC_DEBUG

Gate error injection feature with CONFIG_EDAC_DEBUG so that it is not
visible in production setups.
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: York Sun <york.sun@nxp.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: https://lkml.kernel.org/r/20181119225303.13265-1-york.sun@nxp.com

drivers/edac/fsl_ddr_edac.c

@@ -51,6 +51,7 @@ static inline void ddr_out32(void __iomem *addr, u32 value)
 		iowrite32be(value, addr);
 }
 
+#ifdef CONFIG_EDAC_DEBUG
 /************************ MC SYSFS parts ***********************************/
 
 #define to_mci(k) container_of(k, struct mem_ctl_info, dev)
@@ -151,11 +152,14 @@ static DEVICE_ATTR(inject_data_lo, S_IRUGO | S_IWUSR,
 		   fsl_mc_inject_data_lo_show, fsl_mc_inject_data_lo_store);
 static DEVICE_ATTR(inject_ctrl, S_IRUGO | S_IWUSR,
 		   fsl_mc_inject_ctrl_show, fsl_mc_inject_ctrl_store);
+#endif /* CONFIG_EDAC_DEBUG */
 
 static struct attribute *fsl_ddr_dev_attrs[] = {
+#ifdef CONFIG_EDAC_DEBUG
 	&dev_attr_inject_data_hi.attr,
 	&dev_attr_inject_data_lo.attr,
 	&dev_attr_inject_ctrl.attr,
+#endif
 	NULL
 };