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It is useful to have LOG_LEVEL_VERBOSE because it prints the memory map
of each image, but that also means that the change_mem_attributes and
get_mem_attributes functions have verbose prints, and generate a too
long text output that hides other useful information.

As they were mostly there for debug purposes, this patch removes them.

Change-Id: I2986537377d1f78be2b79cc8a6cf230c380bdb55
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>