arm: mx6: tqma6: CPU type selection via Kconfig

This is the first patch to remove the
CONFIG_SYS_EXTRA_OPTIONS.

This patch implements CPU type selection from Kconfig.
Further Kconfig stuff is added later.

Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
diff --git a/configs/tqma6q_mba6_mmc_defconfig b/configs/tqma6q_mba6_mmc_defconfig
index 01355b6..31b3fc3 100644
--- a/configs/tqma6q_mba6_mmc_defconfig
+++ b/configs/tqma6q_mba6_mmc_defconfig
@@ -1,5 +1,6 @@
 CONFIG_ARM=y
+CONFIG_ARCH_MX6=y
 CONFIG_TARGET_TQMA6=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6q.cfg,MX6Q,MBA6,TQMA6X_MMC_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6q.cfg,MBA6,TQMA6X_MMC_BOOT"
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_NET=y