[PATCH] tee: add ARM_SMCCC dependency

[Arnd Bergmann]

For the moment, the tee subsystem only makes sense in combination with
the op-tee driver that depends on ARM_SMCCC, so let's hide the subsystem
from users that can't select that.

Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig
index 2330a4eb4e8b..2824398fc5d6 100644
--- a/drivers/tee/Kconfig
+++ b/drivers/tee/Kconfig
@@ -1,6 +1,7 @@
 # Generic Trusted Execution Environment Configuration
 config TEE
  tristate "Trusted Execution Environment support"
+ depends on HAVE_ARM_SMCCC || COMPILE_TEST # until we have more than one driver
  select DMA_SHARED_BUFFER
  select GENERIC_ALLOCATOR
  help