rtc: stm32: remove incorrect #ifdef check

rtc: stm32: remove incorrect #ifdef check

After a previous commit changed the driver over to
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(), the suspend/resume
functions must no longer be hidden behind an #ifdef:

In file included from include/linux/clk.h:13,
                 from drivers/rtc/rtc-stm32.c:8:
drivers/rtc/rtc-stm32.c:927:39: error: 'stm32_rtc_suspend' undeclared here (not in a function); did you mean 'stm32_rtc_probe'?
  927 |         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(stm32_rtc_suspend, stm32_rtc_resume)
      |                                       ^~~~~~~~~~~~~~~~~
include/linux/kernel.h:58:44: note: in definition of macro 'PTR_IF'
   58 | #define PTR_IF(cond, ptr)       ((cond) ? (ptr) : NULL)
      |                                            ^~~
include/linux/pm.h:329:26: note: in expansion of macro 'pm_sleep_ptr'
  329 |         .suspend_noirq = pm_sleep_ptr(suspend_fn), \
      |                          ^~~~~~~~~~~~

Fixes: fb9a7e5360dc8 ("rtc: stm32: change PM callbacks to "_noirq()"")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230801105932.3738430-1-arnd@kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>