Convert CONFIG_TEGRA_CLOCK_SCALING et al to Kconfig

This converts the following to Kconfig:
   CONFIG_TEGRA_CLOCK_SCALING
   CONFIG_TEGRA_LP0
   CONFIG_TEGRA_PMU

Signed-off-by: Tom Rini <trini@konsulko.com>

arch/arm/mach-tegra/tegra20/Kconfig

@@ -1,5 +1,15 @@
 if TEGRA20
 
+config TEGRA_LP0
+	bool
+	select TEGRA_CLOCK_SCALING
+
+config TEGRA_PMU
+	bool
+
+config TEGRA_CLOCK_SCALING
+	bool
+
 choice
 	prompt "Tegra20 board select"
 	optional
@@ -23,6 +33,8 @@ config TARGET_PLUTUX
 config TARGET_SEABOARD
 	bool "NVIDIA Seaboard"
 	select BOARD_LATE_INIT
+	select TEGRA_LP0
+	select TEGRA_PMU
 
 config TARGET_TEC
 	bool "Avionic Design Tamonten Evaluation Carrier"

arch/arm/mach-tegra/tegra20/warmboot.c

@@ -23,10 +23,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#ifndef CONFIG_TEGRA_CLOCK_SCALING
-#error "You must enable CONFIG_TEGRA_CLOCK_SCALING to use CONFIG_TEGRA_LP0"
-#endif
-
 /*
  * This is the place in SRAM where the SDRAM parameters are stored. There
  * are 4 blocks, one for each RAM code

include/configs/seaboard.h

@@ -9,11 +9,6 @@
 
 #include <linux/sizes.h>
 
-/* LP0 suspend / resume */
-#define CONFIG_TEGRA_LP0
-#define CONFIG_TEGRA_PMU
-#define CONFIG_TEGRA_CLOCK_SCALING
-
 #include "tegra20-common.h"
 
 /* High-level configuration options */