Build app/test will be failed for function only defined but not used.
test_prefetch.c:65: error: ‘testfn_prefetch_cmd’ defined but not used
Add attribute used in test function declaration can fix this.
static void __attribute__((used)) testfn_##t(void);
Fixes: 727909c592 ("app/test: introduce dynamic commands list")
Signed-off-by: Marvin Liu <yong.liu@intel.com>
d788ccb130