* ada-lang.c (ada_value_primitive_packed_val): Only check
value_lazy for memory lvals.
* findvar.c (value_of_register_lazy): New function.
(locate_var_value): Only check value_lazy for memory lvals.
* valarith.c (value_subscripted_rvalue): Likewise.
* valops.c (value_fetch_lazy): Handle both memory and register
lvals.
(search_struct_field, value_slice): Only check value_lazy for memory
lvals.
* value.c (struct value): Update comment for lazy.
(value_primitive_field): Only check value_lazy for memory lvals.
* value.h (value_lazy): Update comment.
(value_of_register_lazy): Declare.