clk: qcom: rpmh: Add note about sleep/wake state for BCMs

The sleep/wake state doesn't need to be set here because of specific
RPMh behavior that carries over the active state when sleep/wake state
hasn't been modified. Add a note to the code so we aren't tempted to set
the sleep/wake states.

Cc: Alex Elder <elder@linaro.org>
Cc: Taniya Das <quic_tdas@quicinc.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220517190949.2922197-1-swboyd@chromium.org