r600/sfn: Handle b2b1 like it was a mov

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4609>
diff --git a/src/gallium/drivers/r600/sfn/sfn_emitaluinstruction.cpp b/src/gallium/drivers/r600/sfn/sfn_emitaluinstruction.cpp
index 056a54a..9d6e7a4 100644
--- a/src/gallium/drivers/r600/sfn/sfn_emitaluinstruction.cpp
+++ b/src/gallium/drivers/r600/sfn/sfn_emitaluinstruction.cpp
@@ -55,6 +55,7 @@
    case nir_op_b2f32: return emit_alu_b2f(instr);
    case nir_op_i2b1: return emit_alu_i2orf2_b1(instr, op2_setne_int);
    case nir_op_f2b1: return emit_alu_i2orf2_b1(instr, op2_setne_dx10);
+   case nir_op_b2b1:
    case nir_op_mov:return emit_alu_op1(instr, op1_mov);
    case nir_op_ftrunc: return emit_alu_op1(instr, op1_trunc);
    case nir_op_fabs: return emit_alu_op1(instr, op1_mov, {1 << alu_src0_abs});