OMAP4: Fix -EINVAL for vana, vcxio, vdac

Fixed regulators in twl6030 do not have set_voltage hook.
Regulator core returns -22 if set_voltage is NULL and apply_uV is set
while applying the constraint to set voltage resulting in failure during probe
of these regulators.
Do not set apply_uV for fixed regulators which don't have set_voltage.

machine_constraints_voltage: VANA: failed to apply 2100000uV constraint
twl_reg twl_reg.43: can't register VANA, -22
twl_reg: probe of twl_reg.43 failed with error -22
machine_constraints_voltage: VCXIO: failed to apply 1800000uV constraint
twl_reg twl_reg.44: can't register VCXIO, -22
twl_reg: probe of twl_reg.44 failed with error -22
machine_constraints_voltage: VDAC: failed to apply 1800000uV constraint
twl_reg twl_reg.45: can't register VDAC, -22
twl_reg: probe of twl_reg.45 failed with error -22

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 12d99e5..27d9583 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -433,7 +433,6 @@
 	.constraints = {
 		.min_uV			= 2100000,
 		.max_uV			= 2100000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask	 = REGULATOR_CHANGE_MODE
@@ -445,7 +444,6 @@
 	.constraints = {
 		.min_uV			= 1800000,
 		.max_uV			= 1800000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask	 = REGULATOR_CHANGE_MODE
@@ -457,7 +455,6 @@
 	.constraints = {
 		.min_uV			= 1800000,
 		.max_uV			= 1800000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask	 = REGULATOR_CHANGE_MODE
diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
index fca5b9e..220d3b8 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/arch/arm/mach-omap2/board-omap4panda.c
@@ -304,7 +304,6 @@
 	.constraints = {
 		.min_uV			= 2100000,
 		.max_uV			= 2100000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask	 = REGULATOR_CHANGE_MODE
@@ -316,7 +315,6 @@
 	.constraints = {
 		.min_uV			= 1800000,
 		.max_uV			= 1800000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask	 = REGULATOR_CHANGE_MODE
@@ -328,7 +326,6 @@
 	.constraints = {
 		.min_uV			= 1800000,
 		.max_uV			= 1800000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask	 = REGULATOR_CHANGE_MODE