arch: Fix a small style issue in Linux::ThreadInfo.
arch: Fix a small style issue in Linux::ThreadInfo.

Change-Id: I7f6f938f9412e535df0cbc0687ec9f2de2dbf8e3
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/32918
Reviewed-by: Andreas Sandberg <c9f5686ee5bd561c93f9de79681eee75bfa7f36e@arm.com>
Reviewed-by: Hoa Nguyen <a0aa8449aacb303edcb25d6bbe69da9124f010fc@ucdavis.edu>
Maintainer: Andreas Sandberg <c9f5686ee5bd561c93f9de79681eee75bfa7f36e@arm.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

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