Add bt io region because recent idf writes to it when wifi initialises

Author: dzo

hw/xtensa/esp32.c

@@ -575,6 +575,7 @@ static void esp32_soc_realize(DeviceState *dev, Error **errp)
     esp32_soc_add_unimp_device(sys_mem, "esp32.chipv7_phyb", DR_REG_WDEV_BASE, 0x1000,0);
     esp32_soc_add_unimp_device(sys_mem, "esp32.unknown_wifi", DR_REG_NRX_BASE  , 0x1000,-1);
     esp32_soc_add_unimp_device(sys_mem, "esp32.unknown_wifi1", DR_REG_BB_BASE , 0x1000,-1);
+    esp32_soc_add_unimp_device(sys_mem, "esp32.bt", DR_REG_BT_BASE, 0x1000, 0);
 
     /* st7789v is attached to SPI2 and SPI2 so the both HSPI and VSPI will work, 
     they share a single console*/