rv: Support systems with time64-only syscalls

Some systems (like 32-bit RISC-V) only have the 64-bit time_t versions
of syscalls.  So handle the 32-bit time_t version of those being
undefined.

Fixes: f74f8bb ("rv: Add rtapp_sleep monitor")
Closes: https://lore.kernel.org/oe-kbuild-all/202508160204.SsFyNfo6-lkp@intel.com
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Acked-by: Nam Cao <namcao@linutronix.de>
Link: https://lore.kernel.org/r/20250804194518.97620-2-palmer@dabbelt.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>

Author: palmer-dabbelt

kernel/trace/rv/monitors/sleep/sleep.c

@@ -127,7 +127,9 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
 	mon = ltl_get_monitor(current);
 
 	switch (id) {
+#ifdef __NR_clock_nanosleep
 	case __NR_clock_nanosleep:
+#endif
 #ifdef __NR_clock_nanosleep_time64
 	case __NR_clock_nanosleep_time64:
 #endif
@@ -138,7 +140,9 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
 		ltl_atom_update(current, LTL_CLOCK_NANOSLEEP, true);
 		break;
 
+#ifdef __NR_futex
 	case __NR_futex:
+#endif
 #ifdef __NR_futex_time64
 	case __NR_futex_time64:
 #endif