remove main

Signed-off-by: kevinhuhui <huhuikevin@gmail.com>
400bps coding ok

Signed-off-by: kevinhuhui <huhuikevin@gmail.com>
1. add gpio spi driver, coding finished
2. add hw2000 2.4G module driver, to be finished

Signed-off-by: kevinhuhui <huhuikevin@gmail.com>