[roll] Roll fuchsia [kernel][arm64] Use hwreg-derived constants in arm64_elX_to_el1() This change is an incremental step towards migrating the definition of arm64_elX_to_el1() to libarch for use in physboot, replacing the hard-coded register #defines with those derived directly from the hwreg register definitions. There are two functional changes here, both of which appear to be harmless at this time: * HCR_EL2 is set before CNTHCTL_EL2, CPTR_EL2 as the layout of the last two depend on the first one * The original routine was setting reserved-as-0 bits in CPTR_EL2 (OR'ing with 0x33ff instead of 0x2200) The disassembly before and after was checked locally and these were indeed the only differences. Original-Bug: 42164859 Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1180439 Original-Revision: 2864085917fbf1cbece4d2c1b9c7f93451ec4d0c GitOrigin-RevId: c6219f6d67219e0fbc98bbd9e1c826b59ecdb7da Change-Id: I0a5a71726581e18dbe6a790d919c72386d52f62b
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