Bluetooth: controller: split: Increase pipeline size

Increase pipeline size to accommodate probable multiple
prepare for directed advertising events, with reserved time
which are shorter than prepare duration, being enqueued.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/lll.h

@@ -10,7 +10,7 @@
 #define TICKER_USER_ID_ULL_LOW  MAYFLY_CALL_ID_2
 #define TICKER_USER_ID_THREAD   MAYFLY_CALL_ID_PROGRAM
 
-#define EVENT_PIPELINE_MAX            5
+#define EVENT_PIPELINE_MAX 7
 #define EVENT_DONE_MAX 3
 
 #define HDR_ULL(p)     ((void *)((u8_t *)(p) + sizeof(struct evt_hdr)))