components/bt: Point ACL RX buffer ptr to ACL RX buffer if ACL RX buffer ptr is null

1. When WIFI task or other high priority task blocks the Bluetooth task, ACL RX buffer will use up, ACL RX buffer ptr will point to null and will never point to a valid adress. Causing errors in Bluetooth.
2. hcimsgs.h used whether flow control is on or off

components/bt/bluedroid/hci/hci_hal_h4.c

@@ -25,10 +25,10 @@
 #include "hci/hci_layer.h"
 #include "osi/thread.h"
 #include "esp_bt.h"
+#include "stack/hcimsgs.h"
 
 #if (C2H_FLOW_CONTROL_INCLUDED == TRUE)
 #include "l2c_int.h"
-#include "stack/hcimsgs.h"
 #endif ///C2H_FLOW_CONTROL_INCLUDED == TRUE
 
 #define HCI_HAL_SERIAL_BUFFER_SIZE 1026

components/bt/lib

@@ -1 +1 @@
-Subproject commit 62cabd5b6f55d5a53eb4c13f628f4fd8139f535e
+Subproject commit 16f95952efc63017167c863a7eadd2e8dfd27a61

components/esp32/ld/esp32.rom.ld

@@ -670,6 +670,7 @@ PROVIDE ( ld_acl_tx = 0x4002ffdc );
 PROVIDE ( ld_acl_rx_sync = 0x4002fbec );
 PROVIDE ( ld_acl_rx_sync2 = 0x4002fd8c );
 PROVIDE ( ld_acl_rx_no_sync = 0x4002fe78 );
+PROVIDE ( ld_acl_clk_isr = 0x40030cf8 );
 PROVIDE ( ld_sco_modify = 0x40031778 );
 PROVIDE ( lm_cmd_cmp_send = 0x40051838 );
 PROVIDE ( ld_sco_frm_cbk = 0x400349dc );
@@ -1375,8 +1376,8 @@ PROVIDE ( esp_rom_spiflash_attach = 0x40062a6c );
 PROVIDE ( esp_rom_spiflash_config_clk = 0x40062bc8 );
 PROVIDE ( g_rom_spiflash_chip = 0x3ffae270 );
 
-/* 
-These functions are xtos-related (or call xtos-related functions) and do not play well 
+/*
+These functions are xtos-related (or call xtos-related functions) and do not play well
 with multicore FreeRTOS. Where needed, we provide alternatives that are multicore
 compatible. These functions also use a chunk of static RAM, by not using them we can
 allocate that RAM for general use.