ARM: dts: am33xx: Map baseboard EEPROM on BeagleBone Black

The identification EEPROM on the BeagleBone Black baseboard is supplied
by VDD_3V3A which is supplied by LDO4 on the PMIC. Map this as per the DT
binding for the EEPROM. Since this supply is always-on this has no
practical impact but it does silence a warning at boot due to using a dummy
regulator.

Signed-off-by: Mark Brown <[e-mail]>
Message-Id: <[e-mail]>
Signed-off-by: Tony Lindgren <[e-mail]>

arch/arm/boot/dts/am335x-boneblack.dts

···
 		"NC",
 		"NC";
 };
+
+&baseboard_eeprom {
+	vcc-supply = <&ldo4_reg>;
+};