staging: mt7621-dts: fix register range of memc node in mt7621.dtsi

The memc node from mt7621.dtsi has incorrect register resource.
Fix it according to the programming guide.
Signed-off-by: Weijie Gao <hackpascal@gmail.com>
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Link: https://lore.kernel.org/r/20200109080120.362110-1-gch981213@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-dts/mt7621.dtsi

@@ -138,7 +138,7 @@ i2s: i2s@a00 {
 
 		memc: memc@5000 {
 			compatible = "mtk,mt7621-memc";
-			reg = <0x300 0x100>;
+			reg = <0x5000 0x1000>;
 		};
 
 		cpc: cpc@1fbf0000 {