76ce464073
Without this change, the following test would fail to compile
with `-march=armv8-a+sme`:
```
void func1(const svuint32_t *in, svuint32_t *out) {
[&]() __arm_streaming { *out = *in; }();
}
```
But in general, it's probably better never to inline
streaming functions into non-streaming functions, because
they will have been marked as 'streaming' for a reason
by the user.