spi: bcm2835aux: fix bitmask defines

The bitmasks for txempty and idle interrupts were interchanged.

Signed-off-by: Stephan Olbrich <stephanolbrich@gmx.de>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
1 file changed