ramips: remove unnecessary nodes in DTS for Edimax RG21S

This sdhci and i2c nodes were copy-pasted, but are not needed as
the device does not provide that functionality. Remove them.

Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
[added commit title/message, split patch]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ramips/dts/mt7621_edimax_rg21s.dts

@@ -21,12 +21,6 @@
 		bootargs = "console=ttyS0,57600";
 	};
 
-	palmbus: palmbus@1E000000 {
-		i2c@900 {
-			status = "okay";
-		};
-	};
-
 	keys {
 		compatible = "gpio-keys";
 
@@ -68,10 +62,6 @@
 	};
 };
 
-&sdhci {
-	status = "okay";
-};
-
 &spi0 {
 	status = "okay";