mesa: fix GL_COLOR_SUM enum for drivers without ARB_vertex_program

Commit c13970808 (mesa: GL_EXT_secondary_color is not optional) changed

CHECK_EXTENSION2(EXT_secondary_color, ARB_vetex_program, cap)

to

CHECK_EXTENSION(ARB_vertex_program, cap)

However CHECK_EXTENSION2 checks that either extension is available, not
both. Remove the extension check entirely since the intent was for it to
always be enabled.

v2: Fix glGet*(GL_COLOR_SUM) too.  Suggested by Ian.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Cc: 9.2 10.0 <mesa-stable@lists.freedesktop.org>

src/mesa/main/enable.c

@@ -762,7 +762,6 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
       case GL_COLOR_SUM_EXT:
          if (ctx->API != API_OPENGL_COMPAT)
             goto invalid_enum_error;
-         CHECK_EXTENSION(ARB_vertex_program, cap);
          if (ctx->Fog.ColorSumEnabled == state)
             return;
          FLUSH_VERTICES(ctx, _NEW_FOG);
@@ -1443,7 +1442,6 @@ _mesa_IsEnabled( GLenum cap )
       case GL_COLOR_SUM_EXT:
          if (ctx->API != API_OPENGL_COMPAT)
             goto invalid_enum_error;
-         CHECK_EXTENSION(ARB_vertex_program);
          return ctx->Fog.ColorSumEnabled;
 
       /* GL_ARB_multisample */

src/mesa/main/get_hash_params.py

@@ -541,7 +541,7 @@ descriptor=[
   [ "TRANSPOSE_TEXTURE_MATRIX_ARB", "CONTEXT_MATRIX_T(TextureMatrixStack), NO_EXTRA" ],
 
 # GL_EXT_secondary_color
-  [ "COLOR_SUM", "CONTEXT_BOOL(Fog.ColorSumEnabled), extra_ARB_vertex_program" ],
+  [ "COLOR_SUM", "CONTEXT_BOOL(Fog.ColorSumEnabled), NO_EXTRA" ],
   [ "CURRENT_SECONDARY_COLOR", "CONTEXT_FIELD(Current.Attrib[VERT_ATTRIB_COLOR1][0], TYPE_FLOATN_4), extra_flush_current" ],
   [ "SECONDARY_COLOR_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_COLOR1].Enabled), NO_EXTRA" ],
   [ "SECONDARY_COLOR_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_COLOR1].Type), NO_EXTRA" ],