amd/common: add ac_vgt_gs_mode() helper

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/common/ac_shader_util.h

@@ -25,6 +25,9 @@
 #define AC_SHADER_UTIL_H
 
 #include <stdbool.h>
+#include <stdint.h>
+
+#include "amd_family.h"
 
 unsigned
 ac_get_spi_shader_z_format(bool writes_z, bool writes_stencil,
@@ -33,4 +36,7 @@ ac_get_spi_shader_z_format(bool writes_z, bool writes_stencil,
 unsigned
 ac_get_cb_shader_mask(unsigned spi_shader_col_format);
 
+uint32_t
+ac_vgt_gs_mode(unsigned gs_max_vert_out, enum chip_class chip_class);
+
 #endif