ARM: shmobile: Mount root file systems in r/w mode for all DT platforms

The shmobile DT files available in the kernel are reference
implementations intended to be used as sample code, as well as for
development. As such, it makes sense to mount the root file system in
read/write mode by default.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a73a4-ape6evm-reference.dts

@@ -16,7 +16,7 @@ / {
 	compatible = "renesas,ape6evm-reference", "renesas,r8a73a4";
 
 	chosen {
-		bootargs = "console=ttySC0,115200 ignore_loglevel";
+		bootargs = "console=ttySC0,115200 ignore_loglevel rw";
 	};
 
 	memory@40000000 {

arch/arm/boot/dts/r8a73a4-ape6evm.dts

@@ -16,7 +16,7 @@ / {
 	compatible = "renesas,ape6evm", "renesas,r8a73a4";
 
 	chosen {
-		bootargs = "console=ttySC0,115200 ignore_loglevel root=/dev/nfs ip=dhcp";
+		bootargs = "console=ttySC0,115200 ignore_loglevel root=/dev/nfs ip=dhcp rw";
 	};
 
 	memory@40000000 {

arch/arm/boot/dts/r8a7778-bockw-reference.dts

@@ -22,7 +22,7 @@ / {
 	compatible = "renesas,bockw-reference", "renesas,r8a7778";
 
 	chosen {
-		bootargs = "console=ttySC0,115200 ignore_loglevel";
+		bootargs = "console=ttySC0,115200 ignore_loglevel rw";
 	};
 
 	memory {

arch/arm/boot/dts/r8a7778-bockw.dts

@@ -22,7 +22,7 @@ / {
 	compatible = "renesas,bockw", "renesas,r8a7778";
 
 	chosen {
-		bootargs = "console=ttySC0,115200 ignore_loglevel ip=dhcp root=/dev/nfs";
+		bootargs = "console=ttySC0,115200 ignore_loglevel ip=dhcp root=/dev/nfs rw";
 	};
 
 	memory {

arch/arm/boot/dts/r8a7779-marzen-reference.dts

@@ -17,7 +17,7 @@ / {
 	compatible = "renesas,marzen-reference", "renesas,r8a7779";
 
 	chosen {
-		bootargs = "console=ttySC2,115200 earlyprintk=sh-sci.2,115200 ignore_loglevel root=/dev/nfs ip=on";
+		bootargs = "console=ttySC2,115200 earlyprintk=sh-sci.2,115200 ignore_loglevel root=/dev/nfs ip=on rw";
 	};
 
 	memory {

arch/arm/boot/dts/r8a7790-lager-reference.dts

@@ -17,7 +17,7 @@ / {
 	compatible = "renesas,lager-reference", "renesas,r8a7790";
 
 	chosen {
-		bootargs = "console=ttySC6,115200 ignore_loglevel";
+		bootargs = "console=ttySC6,115200 ignore_loglevel rw";
 	};
 
 	memory@40000000 {

arch/arm/boot/dts/r8a7790-lager.dts

@@ -16,7 +16,7 @@ / {
 	compatible = "renesas,lager", "renesas,r8a7790";
 
 	chosen {
-		bootargs = "console=ttySC6,115200 ignore_loglevel";
+		bootargs = "console=ttySC6,115200 ignore_loglevel rw";
 	};
 
 	memory@40000000 {

arch/arm/boot/dts/sh73a0-kzm9g-reference.dts

@@ -32,7 +32,7 @@ cpu@0 {
 	};
 
 	chosen {
-		bootargs = "console=tty0 console=ttySC4,115200 root=/dev/nfs ip=dhcp ignore_loglevel earlyprintk=sh-sci.4,115200";
+		bootargs = "console=tty0 console=ttySC4,115200 root=/dev/nfs ip=dhcp ignore_loglevel earlyprintk=sh-sci.4,115200 rw";
 	};
 
 	memory {

arch/arm/boot/dts/sh73a0-kzm9g.dts

@@ -16,7 +16,7 @@ / {
 	compatible = "renesas,kzm9g", "renesas,sh73a0";
 
 	chosen {
-		bootargs = "console=tty0 console=ttySC4,115200 root=/dev/nfs ip=dhcp ignore_loglevel earlyprintk=sh-sci.4,115200";
+		bootargs = "console=tty0 console=ttySC4,115200 root=/dev/nfs ip=dhcp ignore_loglevel earlyprintk=sh-sci.4,115200 rw";
 	};
 
 	memory {