ldp: Fix regulator mapping for ads7846 TS controller

On the OMAP3430LDP board, the ads7846 touchscreen controller
is powered by VAUX1 regulator (supplying 3.0v).
Fix this mapping in the board file, and hence prevent
the ads7846 driver init to fail with the below error..

ads7846 spi1.0: unable to get regulator: -19
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-ldp.c

@@ -327,6 +327,26 @@ static struct regulator_init_data ldp_vmmc1 = {
 	.consumer_supplies	= &ldp_vmmc1_supply,
 };
 
+/* ads7846 on SPI */
+static struct regulator_consumer_supply ldp_vaux1_supplies[] = {
+	REGULATOR_SUPPLY("vcc", "spi1.0"),
+};
+
+/* VAUX1 */
+static struct regulator_init_data ldp_vaux1 = {
+	.constraints = {
+		.min_uV			= 3000000,
+		.max_uV			= 3000000,
+		.apply_uV		= true,
+		.valid_modes_mask	= REGULATOR_MODE_NORMAL
+					| REGULATOR_MODE_STANDBY,
+		.valid_ops_mask		= REGULATOR_CHANGE_MODE
+					| REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies		= ARRAY_SIZE(ldp_vaux1_supplies),
+	.consumer_supplies		= ldp_vaux1_supplies,
+};
+
 static struct twl4030_platform_data ldp_twldata = {
 	.irq_base	= TWL4030_IRQ_BASE,
 	.irq_end	= TWL4030_IRQ_END,
@@ -335,6 +355,7 @@ static struct twl4030_platform_data ldp_twldata = {
 	.madc		= &ldp_madc_data,
 	.usb		= &ldp_usb_data,
 	.vmmc1		= &ldp_vmmc1,
+	.vaux1		= &ldp_vaux1,
 	.gpio		= &ldp_gpio_data,
 	.keypad		= &ldp_kp_twl4030_data,
 };