drm/i915/gvt: Fixed couple of spellings in the file gtt.c

s/negtive/negative/
s/possilbe/possible/

Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210222081838.30328-1-unixbhaskar@gmail.com

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

@@ -1159,8 +1159,8 @@ static inline void ppgtt_generate_shadow_entry(struct intel_gvt_gtt_entry *se,
  * @vgpu: target vgpu
  * @entry: target pfn's gtt entry
  *
- * Return 1 if 2MB huge gtt shadowing is possilbe, 0 if miscondition,
- * negtive if found err.
+ * Return 1 if 2MB huge gtt shadowing is possible, 0 if miscondition,
+ * negative if found err.
  */
 static int is_2MB_gtt_possible(struct intel_vgpu *vgpu,
 	struct intel_gvt_gtt_entry *entry)