sparc: Stop using fp_enable_check.

SPARC and MIPS are the only ISAs using this mechanism. This is a step
towards making them self sufficient and simplifying the ISA parser, it's
interface to the rest of gem5, and it's assumptions about how ISAs are
structured.

Change-Id: Ied85d5012a806321fd717f654d940171da3450af
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/48717
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Boris Shingarov <shingarov@labware.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
7 files changed