For ASICs NAVI10 and above setting display clock [DCEFCLK] is not supported and the sysfs entry is
read-only. As a result, the test falsely fails for these ASICs. ROCm SMI Lib is ASIC independent.
So Display clock set cannot be selectively disabled for these ASICs.
As a compromise if the set (write to sysfs entry) fails due to permission error and euid is root,
assume that set feature is not supported and skip the test.
Change-Id: I7a273878cbf1465b01728705323e8a92a42378dd
Sreekant Somasekharan
c6f695f5a9