snow: do something useful in ramstage()

This cleans up Snow's trivial ramstage, gives it a coreboot table
address and calls hardwaremain().

Change-Id: I84c904bcfd57a5f9eb3969de8a496f01e43bc2f6
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2328
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
1 file changed