tee: combine "config" and "menu" for TEE's menuconfig

Don't let TEE occupy two lines in menuconfig when practically no
other (sub)menu does either.

Signed-off-by: Jan Engelhardt <[e-mail]>
Reviewed-by: Sumit Garg <[e-mail]>
Signed-off-by: Jens Wiklander <[e-mail]>

drivers/tee/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0-only
 # Generic Trusted Execution Environment Configuration
-config TEE
+menuconfig TEE
 	tristate "Trusted Execution Environment support"
 	depends on HAVE_ARM_SMCCC || COMPILE_TEST || CPU_SUP_AMD
 	select CRYPTO
···
 
 if TEE
 
-menu "TEE drivers"
-
 source "drivers/tee/optee/Kconfig"
 source "drivers/tee/amdtee/Kconfig"
-endmenu
 
 endif