spirv: update arguments for vtn_nir_alu_op_for_spirv_opcode()

We don't need anymore the source and destination's data type, just
their bitsize.

v2:
- Use glsl_get_bit_size () instead (Jason).

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/compiler/spirv/spirv_to_nir.c

@@ -1725,8 +1725,8 @@ vtn_handle_constant(struct vtn_builder *b, SpvOp opcode,
          };
 
          nir_op op = vtn_nir_alu_op_for_spirv_opcode(b, opcode, &swap,
-                                                     src_alu_type,
-                                                     dst_alu_type);
+                                                     nir_alu_type_get_type_size(src_alu_type),
+                                                     nir_alu_type_get_type_size(dst_alu_type));
          nir_const_value src[4];
 
          for (unsigned i = 0; i < count - 4; i++) {