SATA: check for return value from sata functions

sata functions are called even if previous functions failed
because return value is not checked.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Dirk Behme <dirk.behme@de.bosch.com>
CC: Fabio Estevam <fabio.estevam@freescale.com>
1 file changed