Revert "Flush icache using rw to r transition"

Failures on armv7 bots.

Bug: 62356545

This reverts commit c8a8a56d20f40ce9d024b5198184f7627e520aa7.

Change-Id: I62adc6ee6536f4c567825bd92424d4b2b72ec9be
1 file changed