Change datatype of stat counter to u64

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Move defines for driver name and version to qca_spi.h

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Move ethtool support to qca_debug.c

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