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/vtn_private.h

@@ -708,7 +708,7 @@ void vtn_foreach_execution_mode(struct vtn_builder *b, struct vtn_value *value,
 
 nir_op vtn_nir_alu_op_for_spirv_opcode(struct vtn_builder *b,
                                        SpvOp opcode, bool *swap,
-                                       nir_alu_type src, nir_alu_type dst);
+                                       unsigned src_bit_size, unsigned dst_bit_size);
 
 void vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
                     const uint32_t *w, unsigned count);