warning: ignoring unsupported character ‘问题修复

'rivers/net/wireless/aic8800/Kconfig:1⚠️ ignoring unsupported character '问题修复：
有一次编译内核，看到有下面的warning：

jian@jian:~/share/kylin/rk-kernel-5.10$ make menuconfig
  UPD     scripts/kconfig/mconf-cfg
  HOSTCC  scripts/kconfig/mconf.o
  HOSTCC  scripts/kconfig/lxdialog/checklist.o
  HOSTCC  scripts/kconfig/lxdialog/inputbox.o
  HOSTCC  scripts/kconfig/lxdialog/menubox.o
  HOSTCC  scripts/kconfig/lxdialog/textbox.o
  HOSTCC  scripts/kconfig/lxdialog/util.o
  HOSTCC  scripts/kconfig/lxdialog/yesno.o
  HOSTLD  scripts/kconfig/mconf
'rivers/net/wireless/aic8800/Kconfig:1:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:2:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:3:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:4:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:6:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:7:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:8:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:9:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:10:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:12:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:14:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:15:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:16:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_fdrv/Kconfig:1:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_fdrv/Kconfig:2:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_fdrv/Kconfig:3:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_fdrv/Kconfig:5:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:17:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_btlpm/Kconfig:1:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_btlpm/Kconfig:2:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_btlpm/Kconfig:3:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/aic8800_btlpm/Kconfig:5:warning: ignoring unsupported character '
'rivers/net/wireless/aic8800/Kconfig:18:warning: ignoring unsupported character '


*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.

细看报错内容，一致为解析Kconfig文件异常。查阅资料后发现，在Windows和Linux系统中，存在换行符的差异。windows下换行符为”0x0a0x0d”。Linux(Unix)系统下换行符为”0x0d”。所以我使用dos2unix 工具把全部的Kconfig文件专户一下就可以了：

find -name Kconfig |xargs dos2unix