boards/acd52832: also use nrf52 common place

boards/acd52832/Makefile.features

-include $(RIOTBOARD)/common/nrf52xxxdk/Makefile.features
+# Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_uart
+
+include $(RIOTBOARD)/common/nrf52/Makefile.features

boards/acd52832/Makefile.include

@@ -4,4 +4,4 @@ export CPU_MODEL = nrf52832xxaa
 # set default port depending on operating system
 PORT_LINUX ?= /dev/ttyUSB0
 
-include $(RIOTBOARD)/common/nrf52xxxdk/Makefile.include
+include $(RIOTBOARD)/common/nrf52/Makefile.include

boards/acd52832/include/periph_conf.h

@@ -23,6 +23,9 @@
 #define PERIPH_CONF_H
 
 #include "periph_cpu.h"
+#include "cfg_clock_32_1.h"
+#include "cfg_rtt_default.h"
+#include "cfg_timer_default.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -31,44 +34,9 @@ extern "C" {
 /**
  * @name    Clock configuration
  *
- * @note    The radio will not work with the internal RC oscillator!
- *
  * @{
  */
 #define CLOCK_CORECLOCK     (64000000U)     /* fixed for all nRF52832 */
-#define CLOCK_HFCLK         (32U)           /* set to  0: internal RC oscillator
-                                             *        32: 32MHz crystal */
-#define CLOCK_LFCLK         (1)             /* set to  0: internal RC oscillator
-                                             *         1: 32.768 kHz crystal
-                                             *         2: derived from HFCLK */
-/** @} */
-
-/**
- * @name    Timer configuration
- * @{
- */
-static const timer_conf_t timer_config[] = {
-    {
-        .dev      = NRF_TIMER1,
-        .channels = 3,
-        .bitmode  = TIMER_BITMODE_BITMODE_32Bit,
-        .irqn     = TIMER1_IRQn
-    }
-};
-
-#define TIMER_0_ISR         isr_timer1
-
-#define TIMER_NUMOF         (sizeof(timer_config) / sizeof(timer_config[0]))
-/** @} */
-
-/**
- * @name    Real time counter configuration
- * @{
- */
-#define RTT_NUMOF           (1U)
-#define RTT_DEV             (1)             /* NRF_RTC1 */
-#define RTT_MAX_VALUE       (0x00ffffff)
-#define RTT_FREQUENCY       (1024)
 /** @} */
 
 /**
@@ -117,3 +85,4 @@ static const i2c_conf_t i2c_config[] = {
 #endif
 
 #endif /* PERIPH_CONF_H */
+/** @} */