Added missing MYNEWT_VAL_BLE_L2CAP_COC_MPS definition

Signed-off-by: Prasad Alatkar <prasad.alatkar@espressif.com>

Merges https://github.com/espressif/esp-idf/pull/5825

components/bt/host/nimble/port/include/esp_nimble_cfg.h

@@ -483,6 +483,10 @@
 #define MYNEWT_VAL_BLE_L2CAP_COC_MAX_NUM CONFIG_BT_NIMBLE_L2CAP_COC_MAX_NUM
 #endif
 
+#ifndef MYNEWT_VAL_BLE_L2CAP_COC_MPS
+#define MYNEWT_VAL_BLE_L2CAP_COC_MPS (MYNEWT_VAL_MSYS_1_BLOCK_SIZE - 8)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_L2CAP_JOIN_RX_FRAGS
 #define MYNEWT_VAL_BLE_L2CAP_JOIN_RX_FRAGS (1)
 #endif