ARM: tegra: paz00: Configure WiFi rfkill switch through device tree

As of d64c732 ("net: rfkill: gpio: add DT support") rfkill-gpio
device can be instantiated via device tree.

Add the declaration there and drop board-paz00.c file and relevant
Makefile fragments.

Tested-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Author: dtor

arch/arm/boot/dts/nvidia/tegra20-paz00.dts

@@ -706,6 +706,14 @@
 		enable-active-high;
 	};
 
+	rfkill {
+		compatible = "rfkill-gpio";
+		label = "wifi_rfkill";
+		radio-type = "wlan";
+		reset-gpios = <&gpio TEGRA_GPIO(D, 1) GPIO_ACTIVE_HIGH>;
+		shutdown-gpios = <&gpio TEGRA_GPIO(K, 5) GPIO_ACTIVE_HIGH>;
+	};
+
 	sound {
 		compatible = "nvidia,tegra-audio-alc5632-paz00",
 			"nvidia,tegra-audio-alc5632";

arch/arm/mach-tegra/Makefile

@@ -15,5 +15,3 @@ obj-$(CONFIG_HOTPLUG_CPU)               += hotplug.o
 
 obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= pm-tegra30.o
 obj-$(CONFIG_ARCH_TEGRA_124_SOC)	+= pm-tegra30.o
-
-obj-$(CONFIG_ARCH_TEGRA_2x_SOC)		+= board-paz00.o

arch/arm/mach-tegra/board-paz00.c

@@ -19,6 +19,4 @@
 void __init tegra_map_common_io(void);
 void __init tegra_init_irq(void);
 
-void __init tegra_paz00_wifikill_init(void);
-
 #endif

arch/arm/mach-tegra/board.h

@@ -83,10 +83,6 @@ static void __init tegra_dt_init(void)
 
 static void __init tegra_dt_init_late(void)
 {
-	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) &&
-	    of_machine_is_compatible("compal,paz00"))
-		tegra_paz00_wifikill_init();
-
 	if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) &&
 	    of_machine_is_compatible("nvidia,tegra20"))
 		platform_device_register_simple("tegra20-cpufreq", -1, NULL, 0);