radeonsi: bump RADEON_LLVM_MAX_SYSTEM_VALUES

ARB_shader_ballot introduces 7 new system values that can be used
in all shader stages.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/gallium/drivers/radeonsi/si_shader.c

@@ -1376,6 +1376,8 @@ static void declare_system_value(struct si_shader_context *ctx,
 	struct gallivm_state *gallivm = &ctx->gallivm;
 	LLVMValueRef value = 0;
 
+	assert(index < RADEON_LLVM_MAX_SYSTEM_VALUES);
+
 	switch (decl->Semantic.Name) {
 	case TGSI_SEMANTIC_INSTANCEID:
 		value = LLVMGetParam(ctx->main_fn,

src/gallium/drivers/radeonsi/si_shader_internal.h

@@ -43,7 +43,7 @@ struct ac_shader_binary;
 
 #define RADEON_LLVM_INITIAL_CF_DEPTH 4
 
-#define RADEON_LLVM_MAX_SYSTEM_VALUES 4
+#define RADEON_LLVM_MAX_SYSTEM_VALUES 11
 #define RADEON_LLVM_MAX_ADDRS 16
 
 struct si_llvm_flow;