mesa: do not use bitfields for advanced-blend state

Signed-off-by: Elie Tournier <elie.tournier@collabora.com>
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5516>

src/compiler/shader_enums.h

@@ -772,25 +772,22 @@ enum gl_access_qualifier
  */
 enum gl_advanced_blend_mode
 {
-   BLEND_NONE           = 0x0000,
-
-   BLEND_MULTIPLY       = 0x0001,
-   BLEND_SCREEN         = 0x0002,
-   BLEND_OVERLAY        = 0x0004,
-   BLEND_DARKEN         = 0x0008,
-   BLEND_LIGHTEN        = 0x0010,
-   BLEND_COLORDODGE     = 0x0020,
-   BLEND_COLORBURN      = 0x0040,
-   BLEND_HARDLIGHT      = 0x0080,
-   BLEND_SOFTLIGHT      = 0x0100,
-   BLEND_DIFFERENCE     = 0x0200,
-   BLEND_EXCLUSION      = 0x0400,
-   BLEND_HSL_HUE        = 0x0800,
-   BLEND_HSL_SATURATION = 0x1000,
-   BLEND_HSL_COLOR      = 0x2000,
-   BLEND_HSL_LUMINOSITY = 0x4000,
-
-   BLEND_ALL            = 0x7fff,
+   BLEND_NONE = 0,
+   BLEND_MULTIPLY,
+   BLEND_SCREEN,
+   BLEND_OVERLAY,
+   BLEND_DARKEN,
+   BLEND_LIGHTEN,
+   BLEND_COLORDODGE,
+   BLEND_COLORBURN,
+   BLEND_HARDLIGHT,
+   BLEND_SOFTLIGHT,
+   BLEND_DIFFERENCE,
+   BLEND_EXCLUSION,
+   BLEND_HSL_HUE,
+   BLEND_HSL_SATURATION,
+   BLEND_HSL_COLOR,
+   BLEND_HSL_LUMINOSITY,
 };
 
 enum blend_func