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Changing ALOG format strings to %zu (for one size_t integer) and to
%td (for a couple of pointer differences). These changes are necessary
when compiling for LP64 architectures.

Change-Id: I9bb667500af1b82c360f0fc84e50d70bd46cba6e
Signed-off-by: Matteo Franchin <matteo.franchin@arm.com>