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/88pm800.c b/drivers/regulator/88pm800.c
index 22ba4c4..d333f7e 100644
--- a/drivers/regulator/88pm800.c
+++ b/drivers/regulator/88pm800.c
@@ -141,16 +141,14 @@
 
 /* Ranges are sorted in ascending order. */
 static const struct regulator_linear_range buck1_volt_range[] = {
-	{ .min_uV = 600000, .min_sel = 0, .max_sel = 0x4f, .uV_step = 12500 },
-	{ .min_uV = 1600000, .min_sel = 0x50, .max_sel = 0x54,
-	  .uV_step = 50000 },
+	REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
+	REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000),
 };
 
 /* BUCK 2~5 have same ranges. */
 static const struct regulator_linear_range buck2_5_volt_range[] = {
-	{ .min_uV = 600000, .min_sel = 0, .max_sel = 0x4f, .uV_step = 12500 },
-	{ .min_uV = 1600000, .min_sel = 0x50, .max_sel = 0x72,
-	  .uV_step = 50000 },
+	REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500),
+	REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000),
 };
 
 static const unsigned int ldo1_volt_table[] = {