Cordio Nordic LL: Readjust memory pool requirements for NRF52840

Author: Donatien Garnier

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NORDIC_CORDIO/TARGET_NRF5x/NRFCordioHCIDriver.cpp

@@ -196,7 +196,11 @@ NRFCordioHCIDriver::~NRFCordioHCIDriver()
 ble::vendor::cordio::buf_pool_desc_t NRFCordioHCIDriver::get_buffer_pool_description()
 {
     static union {
+        #if defined(NRF52840_XXAA)
+        uint8_t buffer[ 17304 ];
+        #else
         uint8_t buffer[ 8920 ];
+        #endif
         uint64_t align;
     };
     static const wsfBufPoolDesc_t pool_desc[] = {