ramips: remove obsolete mx25l25635f compatible hack

The kernel bump to 5.4 has removed the mx25l25635f hack, and the
mx25l25635f compatible is no longer required.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>

target/linux/ramips/dts/mt7620a_youku_yk1.dts

@@ -67,7 +67,7 @@
 	status = "okay";
 
 	flash@0 {
-		compatible = "mx25l25635f", "jedec,spi-nor";
+		compatible = "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <25000000>;
 		m25p,fast-read;

target/linux/ramips/dts/mt7621_glinet_gl-mt1300.dts

@@ -65,7 +65,7 @@
 	status = "okay";
 
 	flash@0 {
-		compatible = "mx25l25635f", "jedec,spi-nor";
+		compatible = "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <80000000>;
 		m25p,fast-read;

target/linux/ramips/dts/mt7621_ubnt_unifi-6-lite.dts

@@ -15,7 +15,7 @@
 	status = "okay";
 
 	flash@0 {
-		compatible = "mx25l25635f", "jedec,spi-nor";
+		compatible = "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <50000000>;
 

target/linux/ramips/dts/mt7621_ubnt_unifi-nanohd.dts

@@ -11,7 +11,7 @@
 	status = "okay";
 
 	flash@0 {
-		compatible = "mx25l25635f", "jedec,spi-nor";
+		compatible = "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <50000000>;