nrf/temp: Move module configuration guard.

This patch moves the check for MICROPY_PY_MACHINE_TEMP to come
before the inclusion of nrf_temp.h. The nrf_temp.h depends on
the NRF_TEMP_Type which might not be defined for all nRF devices.

ports/nrf/modules/machine/temp.c

@@ -30,6 +30,9 @@
 #include "py/nlr.h"
 #include "py/runtime.h"
 #include "py/mphal.h"
+
+#if MICROPY_PY_MACHINE_TEMP
+
 #include "temp.h"
 #include "nrf_temp.h"
 
@@ -40,8 +43,6 @@
 #define BLUETOOTH_STACK_ENABLED() (ble_drv_stack_enabled())
 #endif // BLUETOOTH_SD
 
-#if MICROPY_PY_MACHINE_TEMP
-
 typedef struct _machine_temp_obj_t {
     mp_obj_base_t base;
 } machine_temp_obj_t;