ARM: tegra: apalis-tk1: replace underscores in node names with dashes

As underscores in node names are not recommended replace them all where
possible with dashes.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra124-apalis-eval.dts

@@ -282,7 +282,7 @@ reg_usbh_vbus: regulator-usbh-vbus {
 
 &gpio {
 	/* Apalis GPIO7 MXM3 pin 15 PLX PEX 8605 PCIe Switch Reset */
-	pex_perst_n {
+	pex-perst-n {
 		gpio-hog;
 		gpios = <TEGRA_GPIO(DD, 1) GPIO_ACTIVE_HIGH>;
 		output-high;

arch/arm/boot/dts/tegra124-apalis-v1.2-eval.dts

@@ -248,7 +248,7 @@ reg_usbh_vbus: regulator-usbh-vbus {
 
 &gpio {
 	/* Apalis GPIO7 MXM3 pin 15 PLX PEX 8605 PCIe Switch Reset */
-	pex_perst_n {
+	pex-perst-n {
 		gpio-hog;
 		gpios = <TEGRA_GPIO(DD, 1) GPIO_ACTIVE_HIGH>;
 		output-high;