drm/amdgpu: Fix a typo in the include header guard of 'navi12_ip_offset.h'

'_navi10_ip_offset_HEADER' is already used in 'navi10_ip_offset.h', so use
'_navi12_ip_offset_HEADER' instead here.
Reviewed-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/navi12_ip_offset.h

@@ -18,8 +18,8 @@
  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
-#ifndef _navi10_ip_offset_HEADER
-#define _navi10_ip_offset_HEADER
+#ifndef _navi12_ip_offset_HEADER
+#define _navi12_ip_offset_HEADER
 
 #define MAX_INSTANCE                                       7
 #define MAX_SEGMENT                                        5