drm/i915: Correct typo in i915_vma_compress_finish stub

A copy and paste error in setting up the !CONFIG_DRM_I915_CAPTURE_ERROR
stubs left a conflicting duplicate declaration.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200111083007.1619228-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gpu_error.h

@@ -304,12 +304,13 @@ intel_engine_coredump_add_vma(struct intel_engine_coredump *ee,
 }
 
 static inline struct i915_vma_compress *
-i915_vma_compress_prepare(struct intel_gt_coredump *gt)
+i915_vma_capture_prepare(struct intel_gt_coredump *gt)
 {
 	return NULL;
 }
 
-void i915_vma_compress_prepare(struct i915_vma_compress *compress)
+void i915_vma_capture_finish(struct intel_gt_coredump *gt,
+			     struct i915_vma_compress *compress)
 {
 }