spi/pl022: initialize burstsize from FIFO trigger level

Configure the DMA burstsize from the FIFO trigger level supplied
with the controller configuration data. This is based on a patch
from Virupax, but I rewrote it differently.

Reported-by: Virupax Sadashivpetimath <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Grant Likely <[email protected]>
1 file changed