drm/i915/gvt: Rename ggtt related functions to be more specific

Accurate names help to avoid confusing so improve readability.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

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

@@ -124,7 +124,7 @@ int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
 		if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
 			goto err;
 
-		ret = intel_vgpu_emulate_gtt_mmio_read(vgpu, offset,
+		ret = intel_vgpu_emulate_ggtt_mmio_read(vgpu, offset,
 				p_data, bytes);
 		if (ret)
 			goto err;
@@ -197,7 +197,7 @@ int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, uint64_t pa,
 		if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
 			goto err;
 
-		ret = intel_vgpu_emulate_gtt_mmio_write(vgpu, offset,
+		ret = intel_vgpu_emulate_ggtt_mmio_write(vgpu, offset,
 				p_data, bytes);
 		if (ret)
 			goto err;