x86: clean up comments wrt. rd{msr|tsc|pmc}

The rdmsr instruction(et al) for i386 and x86-64 are semantically same.
The only difference is how gcc interpret constraint "A" for these targets.

Signed-off-by: Jike Song <albcamus@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jike Song 2008-10-17 13:25:07 +08:00 • committed by Ingo Molnar
commit d4f1b10365