target-i386: cpu: add missing flags to Haswell CPU model

target-i386: cpu: add missing flags to Haswell CPU model

When adding the Haswell CPU model, I intended to make it a superset of the
features present on the SandyBridge model, but I have removed the SEP and
RDTSCP features from the feature list by mistake. This patch adds the missing
SEP and RDTSCP features (that are present on SandyBridge) to Haswell.

Reported-by: Martin Kletzander <[email protected]>
Acked-by: Andreas Färber <[email protected]>
Signed-off-by: Eduardo Habkost <[email protected]>
Signed-off-by: Anthony Liguori <[email protected]>