arm: imx: mx7: Move CONFIG_OPTEE_TZDRAM_SIZE from lib/optee

This config is only used by three boards with this SOC. Most other
platforms derive this information from devicetree, and are unlikely
to ever need this config.

Moreover, it is confusing when Kconfig asks for this value under
"Support OPTEE images", but does not do anything with the value.
Move it to imx7 for those boards who still make use of it.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

arch/arm/mach-imx/mx7/Kconfig

@@ -23,6 +23,14 @@ config SPL_TEXT_BASE
 	depends on SPL
 	default 0x00912000
 
+config OPTEE_TZDRAM_SIZE
+	hex "Amount of Trust-Zone RAM for the OPTEE image"
+	default 0x0000000
+	depends on OPTEE_LIB
+	help
+	  The size of pre-allocated Trust Zone DRAM to allocate for the OPTEE
+	  runtime.
+
 choice
 	prompt "MX7 board select"
 	optional

lib/optee/Kconfig

@@ -11,14 +11,6 @@ config OPTEE_IMAGE
 	  This option enable the OPTEE specific checks done before booting
 	  an OPTEE image created with mkimage
 
-config OPTEE_TZDRAM_SIZE
-	hex "Amount of Trust-Zone RAM for the OPTEE image"
-	default 0x0000000
-	depends on OPTEE_LIB
-	help
-	  The size of pre-allocated Trust Zone DRAM to allocate for the OPTEE
-	  runtime.
-
 config BOOTM_OPTEE
 	bool "Support OPTEE bootm command"
 	select BOOTM_LINUX