ARM: dts: am335x-boneblack: move fixed regulator to board level

3.3V fixed regulator does not belong to TPS node - as a result
the fixed regulator is never probed and MMC is continually deferred
due to lack of regulator.

Move the fixed regulator to be at root of platform.

Cc: Joel Fernandes <joelf@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Tested-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>

arch/arm/boot/dts/am335x-bone-common.dtsi

@@ -55,6 +55,13 @@
 			default-state = "off";
 		};
 	};
+
+	vmmcsd_fixed: fixedregulator@0 {
+		compatible = "regulator-fixed";
+		regulator-name = "vmmcsd_fixed";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+	};
 };
 
 &am33xx_pinmux {
@@ -257,13 +264,6 @@
 			regulator-always-on;
 		};
 	};
-
-	vmmcsd_fixed: fixedregulator@0 {
-		compatible = "regulator-fixed";
-		regulator-name = "vmmcsd_fixed";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-	};
 };
 
 &cpsw_emac0 {