imx: Use SATA instead of CMD_SATA

This causes a build failure on mx6cuboxi with split config, since CMD_SATA
shows up as enabled in SPl (because there is no SPL_CMD_SATA).

The condition is wrong anyway, so change it to use SATA instead.

Signed-off-by: Simon Glass <sjg@chromium.org>

board/solidrun/mx6cuboxi/mx6cuboxi.c

@@ -275,7 +275,7 @@ int board_early_init_f(void)
 {
 	setup_iomux_uart();
 
-#ifdef CONFIG_CMD_SATA
+#ifdef CONFIG_SATA
 	setup_sata();
 #endif
 	setup_fec();