Add new functions "sifive_prci_clock_enable(), sifive_prci_clock_disable()
and sifive_clk_is_enabled()" to enable or disable the PRCI clock
Signed-off-by: NPragnesh Patel <pragnesh.patel@sifive.com>
Tested-by: NZong Li <zong.li@sifive.com>
Link: https://lore.kernel.org/r/20201209094916.17383-6-zong.li@sifive.comSigned-off-by: NStephen Boyd <sboyd@kernel.org>