drm/i915: move error state to own compilation unit

Move error state generation and stringification to it's
own compilation unit. Sysfs also uses this so it can't be
under CONFIG_DEBUG_FS

This fixes a regression introduced in

commit ef86ddced720fddc3835558447a7f594d3609c73
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Thu Jun 6 17:38:54 2013 +0300

    drm/i915: add error_state sysfs entry

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=66814
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 81c3ca14fa92..2abb53e6f1e0 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -1412,9 +1412,6 @@ void intel_cleanup_overlay(struct drm_device *dev)
         kfree(dev_priv->overlay);
 }
 
-#ifdef CONFIG_DEBUG_FS
-#include <linux/seq_file.h>
-
 struct intel_overlay_error_state {
         struct overlay_registers regs;
         unsigned long base;
@@ -1537,4 +1534,3 @@ intel_overlay_print_error_state(struct drm_i915_error_state_buf *m,
         P(UVSCALEV);
 #undef P
 }
-#endif