Revert "char/lrng: add capability to store the return IP of the hard …

…interrupt handler for RT"

This reverts commit d26855e.

drivers/char/lrng/lrng_sw_noise.c

@@ -660,7 +660,7 @@ static inline void lrng_time_process(void)
 }
 
 /* Hot code path - Callback for interrupt handler */
-void add_interrupt_randomness(int irq, int irq_flg, __u64 ip)
+void add_interrupt_randomness(int irq, int irq_flg)
 {
 	if (lrng_pool_highres_timer()) {
 		lrng_time_process();