ARM: imx: Add support for detecting primary/secondary bmode on MX8M

Implement the 'getprisec' subcommand of 'bmode' command for i.MX8M by
reading out the ROM log events. This event is set by the BootROM if it
switched to the secondary copy due to primary copy being corrupted.

Signed-off-by: Fedor Ross <fedor.ross@ifm.com>
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 266bb20..44e1e16 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -71,7 +71,7 @@
 config CMD_BMODE
 	bool "Support the 'bmode' command"
 	default y
-	depends on ARCH_MX7 || ARCH_MX6 || ARCH_MX5
+	depends on ARCH_IMX8M || ARCH_MX7 || ARCH_MX6 || ARCH_MX5
 	help
 	  This enables the 'bmode' (bootmode) command for forcing
 	  a boot from specific media.