imx: remove SATA boot mode for i.MX 6UL and 6ULL

The NXP i.MX 6UL and 6ULL do not support SATA and have no SATA
boot mode, hence remove it from the boot device detecion. This
fixes a build error introduced with 3bd1642d4d ("imx: fix USB
boot mode detection for i.MX 6UL and 6ULL")

Fixes: 3bd1642d4d ("imx: fix USB boot mode detection for i.MX 6UL and 6ULL")
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
Reviewed-by: Jagan Teki <jagan@openedev.com>

arch/arm/mach-imx/spl.c

@@ -45,8 +45,10 @@ u32 spl_boot_device(void)
 	case IMX6_BMODE_RESERVED:
 		return BOOT_DEVICE_BOARD;
 	/* SATA: See 8.5.4, Table 8-20 */
+#if !defined(CONFIG_MX6UL) && !defined(CONFIG_MX6ULL)
 	case IMX6_BMODE_SATA:
 		return BOOT_DEVICE_SATA;
+#endif
 	/* Serial ROM: See 8.5.5.1, Table 8-22 */
 	case IMX6_BMODE_SERIAL_ROM:
 		/* BOOT_CFG4[2:0] */