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>

drivers/spi/spi-bcm2835aux.c

@@ -73,8 +73,8 @@
 
 /* Bitfields in CNTL1 */
 #define BCM2835_AUX_SPI_CNTL1_CSHIGH	0x00000700
-#define BCM2835_AUX_SPI_CNTL1_IDLE	0x00000080
-#define BCM2835_AUX_SPI_CNTL1_TXEMPTY	0x00000040
+#define BCM2835_AUX_SPI_CNTL1_TXEMPTY	0x00000080
+#define BCM2835_AUX_SPI_CNTL1_IDLE	0x00000040
 #define BCM2835_AUX_SPI_CNTL1_MSBF_IN	0x00000002
 #define BCM2835_AUX_SPI_CNTL1_KEEP_IN	0x00000001