board: transformer-t30: convert ASUS Transformers to use DM PMIC

Since required drivers were merged, we can safely clean up the
board and switch to DM based driver with device tree support.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/arch/arm/dts/tegra30-asus-p1801-t.dts b/arch/arm/dts/tegra30-asus-p1801-t.dts
index 39f7caf..d62d432 100644
--- a/arch/arm/dts/tegra30-asus-p1801-t.dts
+++ b/arch/arm/dts/tegra30-asus-p1801-t.dts
@@ -101,6 +101,7 @@
 					regulator-name = "vdd_emmc_core";
 					regulator-min-microvolt = <3300000>;
 					regulator-max-microvolt = <3300000>;
+					regulator-boot-on;
 				};
 
 				/* uSD slot VDD */
@@ -108,6 +109,7 @@
 					regulator-name = "vdd_usd";
 					regulator-min-microvolt = <3100000>;
 					regulator-max-microvolt = <3100000>;
+					regulator-boot-on;
 				};
 
 				/* uSD slot VDDIO */