exynos5420: Change some clock settings.

This change adjusts some clock settings so that they match U-Boot. There are
three different changes.

1. Change the source for psgen from the oscillator clock to the pclk.
2. Change the pll feeding the SPI busses from epll to mpll, as suggested in
   the manual.
3. Change the SPI prescaller.

Change-Id: Ib54a255bc14fc286629dac86db9b8cf8e75a610b
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3700
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed