Add the new system bus frequency pm-qos object for older kernels

Add the new system bus frequency pm-qos object for older kernels

This adds the new system_bus_freq_pm_qos for older kernels.
This also fixes a compile warning on possible array out of
bounds access on pm-qos, this was due to the fact that the
pm-qos implementation we had on code was out of synch with
the header we were copying over. This synchs up the array
to what is in linux-next as of linux-next tag next-20100111

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>