lib: Kconfig: fix PHANDLE_CHECK_SEQ position outside of menu

CONFIG_PHANDLE_CHECK_SEQ is outside of the menu 'Library routines'
thus it's invisible in menuconfig and cannot be selected.
Fix this by moving the 'endmenu' after the PHANDLE_CHECK_SEQ definition

Fixes: c589132a1d ("fdt: Use phandle to distinguish DT nodes with same name")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/Kconfig b/lib/Kconfig
index 1883ac7..35fc9e4 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -837,11 +837,11 @@
 	  Define the number of supported reserved regions in the library logical
 	  memory blocks.
 
-endmenu
-
 config PHANDLE_CHECK_SEQ
 	bool "Enable phandle check while getting sequence number"
 	help
 	  When there are multiple device tree nodes with same name,
           enable this config option to distinguish them using
 	  phandles in fdtdec_get_alias_seq() function.
+
+endmenu