libutee: demote allocation traces from DEBUG to FLOW
libutee: demote allocation traces from DEBUG to FLOW

When CFG_TEE_CORE_USER_MEM_DEBUG=1 (which is the default, enables
additional checks in tee_user_mem.c and also enables traces) and
CFG_TEE_TA_LOG_LEVEL=3 (DEBUG), libutee logs messages for each and
every allocation and deallocation, as follows:

DEBUG:   USER-TA: tee_user_mem_alloc:343: Allocate: link:[0x1211a0], buf:[0x1211b0:12]
DEBUG:   USER-TA: tee_user_mem_free:442: Free: link:[0x1211a0], buf:[0x1211b0:12]
...

That's annoying and pretty much useless so let's change them to use
the lower TRACE_FLOW level (CFG_TEE_TA_LOG_LEVEL=4) instead.

Signed-off-by: Jerome Forissier <ced78d268b4c9a0a20a59a9feeebd2ad90da03d3@linaro.org>
Reviewed-by: Jens Wiklander <7706914404370d7502c27a0eff493dcf491feb51@linaro.org>
Reviewed-by: Etienne Carriere <f21bc5b8f3ea1962eb45af359f1abea6578cab94@linaro.org>

pascal-brand-st-dev/optee_os,pascal-brand-st-dev/optee_os,pascal-brand-st-dev/optee_os,pascal-brand-st-dev/optee_os,pascal-brand-st-dev/optee_os