sata: dwc_ahsata: Fix memory issue in reset_sata

The reset_sata should reset the sata device info and free the
probe_ent memory. Otherwise, it will cause memory leak if we
init the sata again.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>