mx6ull: Handle the CONFIG_MX6ULL cases correctly

Since commit 051ba9e082f7 ("Kconfig: mx6ull: Deselect MX6UL from
CONFIG_MX6ULL") CONFIG_MX6ULL does not select CONFIG_MX6UL anymore, so
take this into consideration in all the checks for CONFIG_MX6UL.

This fixes a boot regression.

Reported-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Tested-by: Breno Lima <breno.lima@nxp.com>
Tested-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
Tested-by: Jörg Krause <joerg.krause@embedded.rocks>
diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index 18e1e67..2552a50 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -8,7 +8,7 @@
 	bool
 
 config MX6
-	select ARM_ERRATA_743622 if !MX6UL
+	select ARM_ERRATA_743622 if !MX6UL && !MX6ULL
 	bool
 	default y
 	imply CMD_FUSE