spi/pl022: only enable RX interrupts when TX is complete

For interrupt mode transfers, start with only TX interrupts enabled
to reduce the overall number of interrupts received. Once TX is
complete, enable RX interrupts to complete the transfer.

Reviewed-by: Viresh Kumar <[email protected]>
Signed-off-by: Chris Blair <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
1 file changed