ARM: OMAP2+: Remove apply_uV constraints for fixed regulator

VUSB is a fixed regulator, so get rid of the apply_uV constraint
for it, which fixes the following error seen at boot on omap4
SDP and PANDA boards.

machine_constraints_voltage: VUSB: failed to apply 3300000uV constraint
twl_reg twl_reg.46: can't register VUSB, -22
twl_reg: probe of twl_reg.46 failed with error -22
Signed-off-by: NRajendra Nayak <rnayak@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/twl-common.c

@@ -270,7 +270,6 @@ static struct regulator_init_data omap4_vusb_idata = {
 	.constraints = {
 		.min_uV			= 3300000,
 		.max_uV			= 3300000,
-		.apply_uV		= true,
 		.valid_modes_mask	= REGULATOR_MODE_NORMAL
 					| REGULATOR_MODE_STANDBY,
 		.valid_ops_mask		= REGULATOR_CHANGE_MODE