ARM: dts: aspeed: galaxy100: Remove redundant ADC device

Remove ADC device from galaxy100 device tree because the device is
already enabled in "ast2400-facebook-netbmc-common.dtsi".

Signed-off-by: Tao Ren <[e-mail]>
Reviewed-by: Joel Stanley <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Joel Stanley <[e-mail]>

arch/arm/boot/dts/aspeed-bmc-facebook-galaxy100.dts

···
 &vhub {
 	status = "okay";
 };
-
-&adc {
-	status = "okay";
-};