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 <magnus.templing@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
[Fixups from review by Wolfram Sang]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
1 file changed