regulator: mpq7920: Fix incorrect defines

Fix defines for MPQ7920_MASK_BUCK_ILIM and MPQ7920_DISCHARGE_ON
Remove unused MPQ7920_REG_REGULATOR_EN1.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20200115002953.14731-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mpq7920.h

@@ -43,11 +43,10 @@
 #define MPQ7920_LDO5_REG_B		0x1e
 #define MPQ7920_LDO5_REG_C		0x1f
 #define MPQ7920_REG_MODE		0x20
-#define MPQ7920_REG_REGULATOR_EN1	0x22
 #define MPQ7920_REG_REGULATOR_EN	0x22
 
 #define MPQ7920_MASK_VREF		0x7f
-#define MPQ7920_MASK_BUCK_ILIM		0xd0
+#define MPQ7920_MASK_BUCK_ILIM		0xc0
 #define MPQ7920_MASK_LDO_ILIM		BIT(6)
 #define MPQ7920_MASK_DISCHARGE		BIT(5)
 #define MPQ7920_MASK_MODE		0xc0
@@ -57,7 +56,7 @@
 #define MPQ7920_MASK_DVS_SLEWRATE	0xc0
 #define MPQ7920_MASK_OVP		0x40
 #define MPQ7920_OVP_DISABLE		~(0x40)
-#define MPQ7920_DISCHARGE_ON		0x1
+#define MPQ7920_DISCHARGE_ON		BIT(5)
 
 #define MPQ7920_REGULATOR_EN_OFFSET	7