tree e972aaa6eaaf226ffd807586edfac9be9cc48a37
parent 1cdbbdacfff48e5378e576733cd4a45b970dcaa8
author Per Åstrand <per.astrand@arm.com> 1645441266 +0100
committer Per Åstrand <per.astrand@arm.com> 1645441266 +0100

Only enable ThreadX for Cortex-M55

The branch on the ThreadX fork doesn't build for Cortex-M33 so only
enable it for Cortex-M55.

Change-Id: I2e562e2f872902a9d87584fbacc4dd6b556d0b51