hal: remove hungarian notation from enums

The 'e' prefix is useless.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
delete hw.h

We actually just need just HAL_NUM_BSSID from hw.h. So copy that to hal.h and delete hw.h entirely.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
hal: clean up structure field names

Simplify them and get rid of camel case style.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>