boot/optee-os: fix typo on BR2_TARGET_OPTEE_OS_LATEST

The typo was added by commit
'9c79b369d6 boot/optee-os: add support for custom tarball URL'

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

boot/optee-os/optee-os.mk

@@ -24,7 +24,7 @@ else
 OPTEE_OS_SITE = $(call github,OP-TEE,optee_os,$(OPTEE_OS_VERSION))
 endif
 
-ifeq ($(BR2_TARGET_OPTEE_OS):$(BR2_TARGET_OPTEE_OS_LATEST_VERSION),y:)
+ifeq ($(BR2_TARGET_OPTEE_OS):$(BR2_TARGET_OPTEE_OS_LATEST),y:)
 BR_NO_CHECK_HASH_FOR += $(OPTEE_OS_SOURCE)
 endif