[WCNCR00166761] ate: modify read path for QA tool FFT

[Description]
Some platform(MT8695) doesn't have /tmp folder.

Solution:
1. modify read path for QA tool FFT, when /tmp doesn't exist,
   read dumpfile from /data/

Change-Id: I8fe223c4a6b15b45a8210a6e538cde9cf6ff080b
Feature: ate
CR-Id: WCNCR00166761
Signed-off-by: Wan-Feng Jiang <wan-feng.jiang@mediatek.com>
1 file changed