[DO NOT MERGE] cts: Add Mediatek target to whitelist in the CTS test case

Mediatek target don't need to define CONFIG_UNMAP_KERNEL_AT_EL0
as the hardware is not vulnerable to CVE-2017-5754.
Hence, whitelisting it.

Bug: 171526779
Test: run cts --m CtsSecurityHostTestCases --t android.security.cts.KernelConfigTest#testConfigHardwareMitigations
Change-Id: If42d91507b7856d675b291ff5c77be35864d1a40
1 file changed