drm/i915/gvt: clean up kernel-doc in gtt.c

Fix kernel-doc warnings in gtt.c:

gtt.c:1152: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
 * Check if can do 2M page
gtt.c:1152: warning: missing initial short description on line:
 * Check if can do 2M page
gtt.c:2209: warning: expecting prototype for intel_vgpu_emulate_gtt_mmio_read(). Prototype was for intel_vgpu_emulate_ggtt_mmio_read() instead

Fixes: a752b07 ("drm/i915/gvt: Fix function comment doc errors")
Fixes: 2707e44 ("drm/i915/gvt: vGPU graphics memory virtualization")
Signed-off-by: Randy Dunlap <[email protected]>
Reported-by: kernel test robot <[email protected]>
Cc: Zhenyu Wang <[email protected]>
Cc: Zhi Wang <[email protected]>
Cc: Colin Xu <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Signed-off-by: Zhi Wang <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Zhi Wang <[email protected]>
Signed-off-by: Zhi Wang <[email protected]>

Author: rddunlap

drivers/gpu/drm/i915/gvt/gtt.c

@@ -1148,7 +1148,7 @@ static inline void ppgtt_generate_shadow_entry(struct intel_gvt_gtt_entry *se,
 	ops->set_pfn(se, s->shadow_page.mfn);
 }
 
-/**
+/*
  * Check if can do 2M page
  * @vgpu: target vgpu
  * @entry: target pfn's gtt entry
@@ -2193,7 +2193,7 @@ static int emulate_ggtt_mmio_read(struct intel_vgpu *vgpu,
 }
 
 /**
- * intel_vgpu_emulate_gtt_mmio_read - emulate GTT MMIO register read
+ * intel_vgpu_emulate_ggtt_mmio_read - emulate GTT MMIO register read
  * @vgpu: a vGPU
  * @off: register offset
  * @p_data: data will be returned to guest