pinctrl: baytrail: Use BIT() in BYT_PULL_ASSIGN_* definitions

The bias setting (pull-up or pull-down) are bit fields and
we never enable them both, hence use BIT() macro to define
them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: andy-shev

drivers/pinctrl/intel/pinctrl-baytrail.c

@@ -52,10 +52,9 @@
 #define BYT_PULL_STR_10K	(1 << BYT_PULL_STR_SHIFT)
 #define BYT_PULL_STR_20K	(2 << BYT_PULL_STR_SHIFT)
 #define BYT_PULL_STR_40K	(3 << BYT_PULL_STR_SHIFT)
-#define BYT_PULL_ASSIGN_SHIFT	7
 #define BYT_PULL_ASSIGN_MASK	GENMASK(8, 7)
-#define BYT_PULL_ASSIGN_UP	(1 << BYT_PULL_ASSIGN_SHIFT)
-#define BYT_PULL_ASSIGN_DOWN	(2 << BYT_PULL_ASSIGN_SHIFT)
+#define BYT_PULL_ASSIGN_DOWN	BIT(8)
+#define BYT_PULL_ASSIGN_UP	BIT(7)
 #define BYT_PIN_MUX		GENMASK(2, 0)
 
 /* BYT_VAL_REG register bits */