gallium: Add PIPE_CAP_ENDIANNESS

Cc: mesa-stable@lists.freedesktop.org
[ Francisco Jerez: Fix "PIPE_ENDIAN_SMALL" in the documentation,
  define PIPE_ENDIAN_NATIVE. ]

src/gallium/drivers/ilo/ilo_screen.c

@@ -421,6 +421,8 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return 1 << 27;
    case PIPE_CAP_MAX_VIEWPORTS:
       return ILO_MAX_VIEWPORTS;
+   case PIPE_CAP_ENDIANNESS:
+      return PIPE_ENDIAN_LITTLE;
 
    default:
       return 0;