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The hardcoded values for PLL1 and PLL2 are wrong. PLL1 is slightly
off -- it defaults to 797.33 MHz, not 800 MHz. PLL2 is disabled by default,
but also configurable.

Tested on a MMP2-based OLPC XO-1.75 laptop, with PLL1=797.33 and various
values of PLL2 set via set-pll2-520mhz, set-pll2-910mhz and
set-pll2-988mhz Open Firmware words.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lkml.kernel.org/r/20200309194254.29009-6-lkundrak@v3.sk

Signed-off-by: Stephen Boyd <sboyd@kernel.org>