clk: ti: am33xx: keep WKUP_DEBUGSS_CLKCTRL enabled

As described in AM335x Errata Advisory 1.0.42, WKUP_DEBUGSS_CLKCTRL
can't be disabled - the clock module will just be stuck in transitioning
state forever, resulting in the following warning message after the wait
loop times out:

l3-aon-clkctrl:0000:0: failed to disable

Just add the clock to enable_init_clks, so no attempt is made to disable
it.

Signed-off-by: Matthias Schiffer <[e-mail]>
Signed-off-by: Alexander Stein <[e-mail]>
Acked-by: Kevin Hilman <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/ti/clk-33xx.c

···
 	"dpll_ddr_m2_ck",
 	"dpll_mpu_m2_ck",
 	"l3_gclk",
+	/* WKUP_DEBUGSS_CLKCTRL - disable fails, AM335x Errata Advisory 1.0.42 */
+	"l3-aon-clkctrl:0000:0",
 	/* AM3_L3_L3_MAIN_CLKCTRL, needed during suspend */
 	"l3-clkctrl:00bc:0",
 	"l4hs_gclk",