clk: renesas: r9a06g032: Set GENPD_FLAG_ALWAYS_ON for clock domain

The RZ/N1 Clock Domain driver does not implement the
generic_pm_domain.power_{on,off}() callbacks, as the domain itself
cannot be powered down.  Hence the domain should be marked as always-on
by setting the GENPD_FLAG_ALWAYS_ON flag, to prevent the core PM Domain
code from considering it for power-off, and doing unnessary processing.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/clk/renesas/r9a06g032-clocks.c

@@ -421,7 +421,8 @@ static int r9a06g032_add_clk_domain(struct device *dev)
 		return -ENOMEM;
 
 	pd->name = np->name;
-	pd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;
+	pd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ALWAYS_ON |
+		    GENPD_FLAG_ACTIVE_WAKEUP;
 	pd->attach_dev = r9a06g032_attach_dev;
 	pd->detach_dev = r9a06g032_detach_dev;
 	pm_genpd_init(pd, &pm_domain_always_on_gov, false);