mesa: allow multisampled format info to be returned on GLES 3.1

The restriction on multisampled integer texture formats only applies to
GLES 3.0, so don't apply it to GLES 3.1 contexts. This fixes a slew of

dEQP-GLES31.functional.state_query.internal_format.*

tests, which now all pass.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>

src/mesa/main/formatquery.c

@@ -131,11 +131,14 @@ _mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname,
             internalformat, buffer);
       break;
    case GL_NUM_SAMPLE_COUNTS: {
-      if (_mesa_is_gles3(ctx) && _mesa_is_enum_format_integer(internalformat)) {
+      if ((ctx->API == API_OPENGLES2 && ctx->Version == 30) &&
+          _mesa_is_enum_format_integer(internalformat)) {
          /* From GL ES 3.0 specification, section 6.1.15 page 236: "Since
           * multisampling is not supported for signed and unsigned integer
           * internal formats, the value of NUM_SAMPLE_COUNTS will be zero
           * for such formats.
+          *
+          * Such a restriction no longer exists in GL ES 3.1.
           */
          buffer[0] = 0;
          count = 1;