Bluetooth: controller: df: Add const to antenna patterns pointer

Add const qualifier in radio API related with setting antenna
switch pattern.

Signed-off-by: Piotr Pryga <[email protected]>

Author: ppryga-nordic

subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/radio/radio_df.c

@@ -316,7 +316,7 @@ void radio_df_ant_switch_pattern_clear(void)
 	NRF_RADIO->CLEARPATTERN = RADIO_CLEARPATTERN_CLEARPATTERN_Clear;
 }
 
-void radio_df_ant_switch_pattern_set(uint8_t *patterns, uint8_t len)
+void radio_df_ant_switch_pattern_set(const uint8_t *patterns, uint8_t len)
 {
 	/* SWITCHPATTERN is like a moving pointer to underlying buffer.
 	 * Each write stores a value and moves the pointer to new free position.

subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/radio/radio_df.h

@@ -39,7 +39,7 @@ void radio_df_ant_switch_pattern_clear(void);
  * Radio internal list. Before start of new patterns clear the list
  * by call to @ref radio_df_ant_switch_pattern_clear.
  */
-void radio_df_ant_switch_pattern_set(uint8_t *patterns, uint8_t len);
+void radio_df_ant_switch_pattern_set(const uint8_t *patterns, uint8_t len);
 /* Provides switch pattern of antenna used to transmit PDU that is used to
  * transmit CTE
  */