rust: rros: add 'CONFIG_RROS_SPINLOCK'

Author: Caspian443

arch/arm64/Kconfig

@@ -1481,6 +1481,7 @@ config CC_HAVE_SHADOW_CALL_STACK
 
 source "kernel/Kconfig.dovetail"
 source "kernel/Kconfig.rros"
+source "kernel/Kconfig.rros_spinlock"
 
 config PARAVIRT
 	bool "Enable paravirtualization code"

kernel/Kconfig.rros_spinlock

@@ -0,0 +1,9 @@
+config RROS_SPINLOCK
+    bool "Enable RROS Spinlock"
+    depends on RROS
+    help
+      Enable spinlock functionality for RROS. This option provides a
+      specialized spinlock mechanism designed for the Rust Real-time Core.
+
+      Note: This option is experimental and should only be enabled if
+      you understand the implications on system performance.