arm64: kconfig: add submenu for 8.2 architectural features

UAO is a feature of ARMv8.2, so add a submenu like we have for 8.1.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 97cd2b9..dbd47bb 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -769,6 +769,8 @@
 
 endmenu
 
+menu "ARMv8.2 architectural features"
+
 config ARM64_UAO
 	bool "Enable support for User Access Override (UAO)"
 	default y
@@ -790,6 +792,8 @@
 	  regular load/store instructions if the cpu does not implement the
 	  feature.
 
+endmenu
+
 config ARM64_MODULE_CMODEL_LARGE
 	bool