ipq40xx: mikrotik: make RouterBoot partition writeable

Linux MTD requires the parent partition be writable for a child
partition to be allowed write permission.
In order for soft_config to be writeable (and modifiable via sysfs),
the parent RouterBoot partition must be writeable

Signed-off-by: Thibaut VARÈNE <[email protected]>

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-cap-ac.dts

@@ -185,7 +185,6 @@
 				#size-cells = <1>;
 				label = "RouterBoot";
 				reg = <0x80000 0x80000>;
-				read-only;
 
 				hard_config {
 					read-only;

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-hap-ac2.dts

@@ -187,7 +187,6 @@
 				#size-cells = <1>;
 				label = "RouterBoot";
 				reg = <0x80000 0x80000>;
-				read-only;
 
 				hard_config {
 					read-only;

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4018-sxtsq-5-ac.dts

@@ -189,7 +189,6 @@
 				#size-cells = <1>;
 				label = "RouterBoot";
 				reg = <0x80000 0x80000>;
-				read-only;
 
 				hard_config {
 					read-only;

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-hap-ac3.dts

@@ -249,7 +249,6 @@
 				#size-cells = <1>;
 				label = "RouterBoot";
 				reg = <0x80000 0x80000>;
-				read-only;
 
 				hard_config {
 					read-only;

target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-lhgg-60ad.dts

@@ -209,7 +209,6 @@
 				#size-cells = <1>;
 				label = "RouterBoot";
 				reg = <0x80000 0x80000>;
-				read-only;
 
 				hard_config {
 					read-only;