kernel.h: Add wrapper for renamed from_timer function for rhel 8.9

kernel.h: Add wrapper for renamed from_timer function for rhel 8.9
see original issue #95

Author: phoneben

include/dahdi/kernel.h

@@ -58,7 +58,7 @@
 
 #include <linux/poll.h>
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 16, 0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 16, 0) || (defined(RHEL_RELEASE_CODE) && defined(RHEL_RELEASE_VERSION) && (RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(9, 8)))
 #define from_timer timer_container_of
 #endif