x86: threadinfo: merge thread sync state definitions

Merge both. x86_64 has an additional TS_COMPAT that is harmless
for 32 bit.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>