From: Joerg Roedel <joerg.roedel@amd.com>

This patch adds the  X86_FEATURE_SYNC_RDTSC to the i386 architecture.
This is very helpfull to simplify the get_cycles_sync() function and
remove the #ifdefs from it.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

-- 
Joerg Roedel
Operating System Research Center
AMD Saxony LLC & Co. KG