Patch merged into coreboot/master: cpu/amd/fam10h-15h: Add tsc_freq_mhz() function

the following patch was just integrated into master:
commit bfa19e1e47e7f383a45c9e6955c7968c3b926540
Author: Timothy Pearson 
Date:   Tue Jan 5 11:00:49 2016 -0600

cpu/amd/fam10h-15h: Add tsc_freq_mhz() function

The AMD Family 10h/15h processors use a TSC that increments at
    the P0 core frequency.  Allow coreboot to query the TSC frequency.

Change-Id: I73ead4fd4af18991452d59985b667a54689778cd
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/12834
    Tested-by: build bot (Jenkins)
    Tested-by: Raptor Engineering Automated Test Stand 
    Reviewed-by: Aaron Durbin 
    Reviewed-by: Paul Menzel

See https://review.coreboot.org/12834 for details.

-gerrit