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>
diff --git a/arch/arm/mach-tegra/tegra20/Kconfig b/arch/arm/mach-tegra/tegra20/Kconfig
index 5c4d35b..345563f 100644
--- a/arch/arm/mach-tegra/tegra20/Kconfig
+++ b/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_SEABOARD
 	bool "NVIDIA Seaboard"
 	select BOARD_LATE_INIT
+	select TEGRA_LP0
+	select TEGRA_PMU
 
 config TARGET_TEC
 	bool "Avionic Design Tamonten Evaluation Carrier"