OMAP5+: sata/scsi: implement scsi_bus_reset()

Implement missing scsi_bus_reset() for SCSI subsystem commands
on OMAP platforms.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Reviewed-by: Tom Rini <trini@ti.com>

arch/arm/cpu/armv7/omap-common/sata.c

@@ -85,3 +85,9 @@ void scsi_init(void)
 	init_sata(0);
 	scsi_scan(1);
 }
+
+void scsi_bus_reset(void)
+{
+	ahci_reset(DWC_AHSATA_BASE);
+	ahci_init(DWC_AHSATA_BASE);
+}