regulator: Add REGULATOR_LINEAR_RANGE macro

Add REGULATOR_LINEAR_RANGE macro and convert regulator drivers to use it.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/regulator/da903x.c b/drivers/regulator/da903x.c
index 90d55e0..6d1b799 100644
--- a/drivers/regulator/da903x.c
+++ b/drivers/regulator/da903x.c
@@ -253,8 +253,8 @@
 }
 
 static const struct regulator_linear_range da9034_ldo12_ranges[] = {
-	{ .min_uV = 1700000, .min_sel =  0, .max_sel = 7, .uV_step =  50000 },
-	{ .min_uV = 2700000, .min_sel =  8, .max_sel = 15, .uV_step =  50000 },
+	REGULATOR_LINEAR_RANGE(1700000, 0, 7, 50000),
+	REGULATOR_LINEAR_RANGE(2700000, 8, 15, 50000),
 };
 
 static struct regulator_ops da903x_regulator_ldo_ops = {