ARM: tegra124: convert TEGRA_SUPPORT_NON_SECURE into Kconfig

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

README

@@ -300,13 +300,6 @@ The following options need to be configured:
 		different from COUNTER_FREQUENCY, and can only be determined
 		at run time.
 
-- Tegra SoC options:
-		CONFIG_TEGRA_SUPPORT_NON_SECURE
-
-		Support executing U-Boot in non-secure (NS) mode. Certain
-		impossible actions will be skipped if the CPU is in NS mode,
-		such as ARM architectural timer initialization.
-
 - Linux Kernel Interface:
 		CONFIG_OF_LIBFDT
 

arch/arm/mach-tegra/Kconfig

@@ -176,6 +176,13 @@ config TEGRA_DISCONNECT_UDC_ON_BOOT
 	  USB controller when U-Boot boots to avoid leaving a stale USB device
 	  present.
 
+config TEGRA_SUPPORT_NON_SECURE
+	bool "Support executing U-Boot in non-secure (NS) mode"
+	depends on TEGRA124
+	help
+	  Certain impossible actions will be skipped if the CPU is in NS mode,
+	  such as ARM architectural timer initialization.
+
 config CI_UDC_HAS_HOSTPC
 	def_bool y
 	depends on CI_UDC && !TEGRA20

arch/arm/mach-tegra/board.c

@@ -77,9 +77,6 @@ bool spl_was_boot_source(void)
 }
 
 #if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
-#if !defined(CONFIG_TEGRA124)
-#error tegra_cpu_is_non_secure has only been validated on Tegra124
-#endif
 bool tegra_cpu_is_non_secure(void)
 {
 	/*