configs: move CONFIG_MXC_OCOTP to Kconfig

While commit 3e020f03e94f ("driver: misc: add MXC_OCOTP Kconfig entry")
introduced a Kconfig entry it did not actually migrate all
configurations to using it.

As CONFIG_MXC_OCOTP was in mx{6/7}_common.h enable it by default on
those architectures. Additionally, also enable it on ARCH_IMX8M and
ARCH_VF610 where all current members enabled it through their legacy
configuration header files.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index d6e677f..0e645f5 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -128,6 +128,8 @@
 
 config MXC_OCOTP
 	bool "Enable MXC OCOTP Driver"
+	depends on ARCH_IMX8M || ARCH_MX6 || ARCH_MX7 || ARCH_VF610
+	default y
 	help
 	  If you say Y here, you will get support for the One Time
 	  Programmable memory pages that are stored on the some