do not need disable irq when spi opt

Signed-off-by: kevinhuhui <huhuikevin@gmail.com>
do not need to add crc for plc mac, it is added in plc driver

Signed-off-by: kevinhuhui <huhuikevin@gmail.com>
"return" changed to "continue" for recv process

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