spi/pl022: timeout on polled transfer v2

This adds the missing handling of polling timeouts and deletes
our last todo.

Signed-off-by: Magnus Templing <[email protected]>
Reviewed-by: Srinidhi Kasagar <[email protected]>
[Fixups from review by Wolfram Sang]
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
1 file changed