gianfar: Fix thinko in gfar_set_rx_stash_index()

We obviously want to write a modified 'temp' value back to the
register, not the saved IRQ flags.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/gianfar_sysfs.c

@@ -186,7 +186,7 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev,
 	temp = gfar_read(&regs->attreli);
 	temp &= ~ATTRELI_EI_MASK;
 	temp |= ATTRELI_EI(index);
-	gfar_write(&regs->attreli, flags);
+	gfar_write(&regs->attreli, temp);
 
 out:
 	unlock_rx_qs(priv);