Workaround: Disable Isolation Level 1 on PSoC64

There is a known issue with L1 test on PSoC64.
It can be reproduced with both GCC & ARMCLANG.
Disable all L1 configs on PSoC64 for the time being.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I81eceb32c098e0a20c188c4b7031a80765383b4e
1 file changed