RAS: Fix prototype warnings

When building with C=2 and/or W=1, legitimate warnings are issued about
missing prototypes:

    CHECK   drivers/ras/debugfs.c
  drivers/ras/debugfs.c:4:15: warning: symbol 'ras_debugfs_dir' was not declared. Should it be static?
  drivers/ras/debugfs.c:8:5: warning: symbol 'ras_userspace_consumers' was not declared. Should it be static?
  drivers/ras/debugfs.c:38:12: warning: symbol 'ras_add_daemon_trace' was not declared. Should it be static?
  drivers/ras/debugfs.c:54:13: warning: symbol 'ras_debugfs_init' was not declared. Should it be static?
    CC      drivers/ras/debugfs.o
  drivers/ras/debugfs.c:8:5: warning: no previous prototype for 'ras_userspace_consumers' [-Wmissing-prototypes]
      8 | int ras_userspace_consumers(void)
        |     ^~~~~~~~~~~~~~~~~~~~~~~
  drivers/ras/debugfs.c:38:12: warning: no previous prototype for 'ras_add_daemon_trace' [-Wmissing-prototypes]
     38 | int __init ras_add_daemon_trace(void)
        |            ^~~~~~~~~~~~~~~~~~~~
  drivers/ras/debugfs.c:54:13: warning: no previous prototype for 'ras_debugfs_init' [-Wmissing-prototypes]
     54 | void __init ras_debugfs_init(void)
        |             ^~~~~~~~~~~~~~~~

Provide the proper includes.

 [ bp: Take care of the same warnings for cec.c too. ]

Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac@vger.kernel.org
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/7168.1565218769@turing-police

drivers/ras/cec.c

@@ -4,6 +4,7 @@
  */
 #include <linux/mm.h>
 #include <linux/gfp.h>
+#include <linux/ras.h>
 #include <linux/kernel.h>
 #include <linux/workqueue.h>
 

drivers/ras/debugfs.c

@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include <linux/debugfs.h>
+#include <linux/ras.h>
+#include "debugfs.h"
 
 struct dentry *ras_debugfs_dir;