Add define for spi status register

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Add spi status register to dump

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Refactor qca->spi_device to qca->spi_dev

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Refactor qca->dev to qca->net_dev

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fix too long line

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Implement spi register dump via debugfs

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>