Adding support for MSPI sys clk 108Mhz available on 7216
and 7278 BRCMSTB SoCs.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20200420190853.45614-9-kdasu.kdev@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>