include: drivers: nrf_clock_control: Fix <hal/nrf_clock.h> inclusion

This is a follow-up to commit 7a2ce28.

Inclusion of <hal/nrf_clock.h> should not be done based on the NRF_CLOCK
symbol being defined, because it depends on the order in which headers
are included - that symbol gets defined when <nrfx.h> gets included and
this is not necessarily always happening earlier. Instead of adding
inclusion of <nrfx.h> here, move inclusion of <hal/nrf_clock.h> under
`#if defined(CONFIG_CLOCK_CONTROL_NRF)` where it is actually needed.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>

Author: anangl

include/zephyr/drivers/clock_control/nrf_clock_control.h

@@ -8,9 +8,6 @@
 #define ZEPHYR_INCLUDE_DRIVERS_CLOCK_CONTROL_NRF_CLOCK_CONTROL_H_
 
 #include <zephyr/device.h>
-#ifdef NRF_CLOCK
-#include <hal/nrf_clock.h>
-#endif
 #include <zephyr/sys/onoff.h>
 #include <zephyr/drivers/clock_control.h>
 
@@ -20,6 +17,8 @@ extern "C" {
 
 #if defined(CONFIG_CLOCK_CONTROL_NRF)
 
+#include <hal/nrf_clock.h>
+
 /** @brief Clocks handled by the CLOCK peripheral.
  *
  * Enum shall be used as a sys argument in clock_control API.