radeonsi: enable SPIR-V and GL 4.6 for NIR

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>

src/gallium/drivers/radeonsi/si_get.c

@@ -193,9 +193,9 @@ static int si_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 
 	case PIPE_CAP_GLSL_FEATURE_LEVEL:
 	case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
-		if (sscreen->info.has_indirect_compute_dispatch)
-				return 450;
-		return 420;
+		if (!sscreen->info.has_indirect_compute_dispatch)
+			return 420;
+		return sscreen->options.enable_nir ? 460 : 450;
 
 	case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
 		/* Optimal number for good TexSubImage performance on Polaris10. */
@@ -216,9 +216,8 @@ static int si_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 
 	case PIPE_CAP_PACKED_UNIFORMS:
 	case PIPE_CAP_SHADER_SAMPLES_IDENTICAL:
-		if (sscreen->options.enable_nir)
-			return 1;
-		return 0;
+	case PIPE_CAP_GL_SPIRV:
+		return sscreen->options.enable_nir;
 
 	case PIPE_CAP_PREFER_IMM_ARRAYS_AS_CONSTBUF:
 		if (sscreen->options.enable_nir)