drm/amdgpu: remove unneeded semicolon

A semicolon is not needed after a switch statement.
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -955,7 +955,7 @@ static char *amdgpu_ras_badpage_flags_str(unsigned int flags)
 	case AMDGPU_RAS_RETIRE_PAGE_FAULT:
 	default:
 		return "F";
-	};
+	}
 }
 
 /**