ASoC: adau1701: type bug with ADAU1707_CLKDIV_UNSET

ADAU1707_CLKDIV_UNSET is always compared against an unsigned int and
not an unsigned long.  The current tests are always false.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/adau1701.c

@@ -91,7 +91,7 @@
 #define ADAU1701_OSCIPOW_OPD		0x04
 #define ADAU1701_DACSET_DACINIT		1
 
-#define ADAU1707_CLKDIV_UNSET		(-1UL)
+#define ADAU1707_CLKDIV_UNSET		(-1U)
 
 #define ADAU1701_FIRMWARE "adau1701.bin"