This serves as a basis to select different bootloaders at runtime in future commits. Change-Id: I2ad0006fae9ad38ec1a6b1f11063be955a4dd2ea Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23669 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>