Add lan9252 for Linux

[KwonTae-young]

• Add kernel device driver drivers/linux/lan9252
• Add lan9252 file for linux applications/linux_lan9252demo soes/hal/linux-lan9252
• Fix linux compatibility for cc.h

  ifdef linux

[KwonTae-young]

Differences from previous pull requests

1. The position of the lan9252 driver source has been changed.
2. The source of the lan9252 driver has been cleaned up.