x86/asm: Rename FS/GS base helpers
They are currently named after the FSGSBASE instructions, but are not thin
wrappers around said instructions, and therefore do not accurately reflect the
logic they perform, especially when it comes to functioning safely in non
FSGSBASE context.
Rename them to {read,write}_{fs,gs}_base() to avoid confusion.
No functional change.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>