optee: Make TZDRAM config options contingent on CONFIG_OPTEE

Commit c7b3a7ee ("optee: adjust dependencies and default values for
dram") makes the TZDRAM defines for OPTEE show up for all configs as a
side-effect. While not harmful its not what we really want.

This patch makes the following defines contingent on CONFIG_OPTEE=y

CONFIG_OPTEE_TZDRAM_BASE
CONFIG_OPTEE_TZDRAM_SIZE

Rightly, if you don't have CONFIG_OPTEE=y you don't care about the above
two defines.
Signed-off-by: NBryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Rui Miguel Silva <rui.silva@linaro.org>
Acked-by: NRui Miguel Silva <rui.silva@linaro.org>

lib/optee/Kconfig

@@ -17,6 +17,7 @@ config OPTEE_LOAD_ADDR
 config OPTEE_TZDRAM_SIZE
 	hex "Amount of Trust-Zone RAM for the OPTEE image"
 	default 0x0000000
+	depends on OPTEE
 	help
 	  The size of pre-allocated Trust Zone DRAM to allocate for the OPTEE
 	  runtime.
@@ -24,6 +25,7 @@ config OPTEE_TZDRAM_SIZE
 config OPTEE_TZDRAM_BASE
 	hex "Base address of Trust-Zone RAM for the OPTEE image"
 	default 0x00000000
+	depends on OPTEE
 	help
 	  The base address of pre-allocated Trust Zone DRAM for
 	  the OPTEE runtime.