gallium: add TGSI_PROPERTY_FS_BLEND_EQUATION_ADVANCED

For virgl, we don't lower advanced equation to fbfetch
So we need to pass the blend equation info in the TGSI to the host

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/gallium/auxiliary/tgsi/tgsi_strings.c

@@ -164,6 +164,7 @@ const char *tgsi_property_names[TGSI_PROPERTY_COUNT] =
    "VS_BLIT_SGPRS_AMD",
    "CS_USER_DATA_COMPONENTS_AMD",
    "LAYER_VIEWPORT_RELATIVE",
+   "FS_BLEND_EQUATION_ADVANCED",
 };
 
 const char *tgsi_return_type_names[TGSI_RETURN_TYPE_COUNT] =

src/gallium/include/pipe/p_shader_tokens.h

@@ -308,6 +308,7 @@ enum tgsi_property_name {
    TGSI_PROPERTY_VS_BLIT_SGPRS_AMD,
    TGSI_PROPERTY_CS_USER_DATA_COMPONENTS_AMD,
    TGSI_PROPERTY_LAYER_VIEWPORT_RELATIVE,
+   TGSI_PROPERTY_FS_BLEND_EQUATION_ADVANCED,
    TGSI_PROPERTY_COUNT,
 };