kernel: kconfig: reorg kernel Kconfig a bit

Move INIT_STACK to debug options and give POSIX layer its own menu.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

kernel/Kconfig

@@ -170,6 +170,17 @@ config APPLICATION_MEMORY
 	  including the C library in it.
 
 menu "Kernel Debugging and Metrics"
+
+config INIT_STACKS
+	bool
+	prompt "Initialize stack areas"
+	default n
+	help
+	  This option instructs the kernel to initialize stack areas with a
+	  known value (0xaa) before they are first used, so that the high
+	  water mark can be easily determined. This applies to the stack areas
+	  for threads.
+
 config KERNEL_DEBUG
 	bool
 	prompt "Kernel debugging"
@@ -323,7 +334,7 @@ config TIMESLICE_PRIORITY
 
 config POLL
 	bool
-	prompt "async I/O framework"
+	prompt "Async I/O Framework"
 	default n
 	help
 	  Asynchronous notification framework. Enable the k_poll() and
@@ -357,9 +368,6 @@ config NUM_PIPE_ASYNC_MSGS
 	  Setting this option to 0 disables support for asynchronous
 	  pipe messages.
 
-endmenu
-
-menu "Memory Pool Options"
 config HEAP_MEM_POOL_SIZE
 	int
 	prompt "Heap memory pool size (in bytes)"
@@ -371,7 +379,6 @@ config HEAP_MEM_POOL_SIZE
 	  heap memory pool is defined.
 endmenu
 
-
 config ARCH_HAS_CUSTOM_SWAP_TO_MAIN
 	bool
 	# hidden
@@ -431,16 +438,6 @@ config SYS_CLOCK_EXISTS
 	help
 	  This option specifies that the kernel lacks timer support.
 
-config INIT_STACKS
-	bool
-	prompt "Initialize stack areas"
-	default n
-	help
-	  This option instructs the kernel to initialize stack areas with a
-	  known value (0xaa) before they are first used, so that the high
-	  water mark can be easily determined. This applies to the stack areas
-	  for threads.
-
 config XIP
 	bool
 	prompt "Execute in place"
@@ -486,6 +483,10 @@ config APPLICATION_INIT_PRIORITY
 	  This priority level is for end-user drivers such as sensors and display
 	  which have no inward dependencies.
 
+
+endmenu
+
+menu "POSIX Layer"
 config PTHREAD_IPC
 	bool
 	prompt "POSIX pthread IPC API"