[coreboot] [patch] update ddr3 max frequency

[Scott Duplichan]

Marc Jones wrote:

]We found this with some testing at BTDC. This patch sets max freq
]defaults for ddr2 and ddr3for fam10. It may be overridden by a
]developer setting it in romstage.c.
]
]Signed-off-by: Marc Jones <marcj303 at gmail.com>

Acked-by: Scott Duplichan [scott at notabs.org]