Revert "qemu_v8.mk: enable MEASURED_BOOT_FTPM by default"

This reverts commit 9bf2bbe. CI has
become quite unstable since that commit was merged, see for instance
the multiple failures in [1] and the absence of failure in [2]. I do
not see any direct relationship betweem fTPM and the errors reported
in the CI runs, but in order to make CI useful again we need to have
it run reliably so disable MEASURED_BOOT_FTPM temporarily.

In my tests, 'make -j$(nproc) check-only XTEST_ARGS="-l 14"' always
failed with a TA panic when MEASURED_BOOT_FTPM=y, and never when it
is =n. The panic sometimes happens in xtest regression_4006, or
sometimes in pkcs11_1021 or pkcs11_1023.

Link: [1] OP-TEE/optee_os#7170
Link: [2] OP-TEE/optee_os#7175
Signed-off-by: Jerome Forissier <[email protected]>
Acked-by: Etienne Carriere <[email protected]>
Acked-by: Jens Wiklander <[email protected]>

qemu_v8.mk

@@ -35,9 +35,6 @@ ifeq ($(shell uname -m),x86_64)
 RUST_ENABLE ?= y
 endif
 
-# Enable fTPM
-MEASURED_BOOT_FTPM ?= y
-
 include common.mk
 
 DEBUG ?= 1