stdlib: Add missing ()s in get_supported_isas.

A function was used directly instead of being called when interating
through ISA names.

Change-Id: I9dc53259a766a68070e0b79bb55f721a93fcdeed
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58929
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed