ptxed: fix load_raw() error values
ptxed: fix load_raw() error values

On error, load_raw() returns 1, yet its caller checks for < 0 to detect errors.
Stick to that convention and adjust load_raw().

Change-Id: I17992fe01b205907d179766e3fa0e3c3b867eb7a
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

01org/processor-trace,01org/processor-trace,01org/processor-trace