HID: amd_sfh: Correct the structure fields

Misinterpreted sfh_cmd_base structure member fields. Therefore, adjust
the structure member fields accordingly to reflect functionality.

Fixes: 93ce5e02 ("HID: amd_sfh: Implement SFH1.1 functionality")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>