clk: at91: allow setting PMC_AUDIOPINCK clock parents via DT

Make AUDIOPINCK accessible via phandle to select it
as peripheral clock parent using assigned-clock-parents in DT
where available.

Signed-off-by: Zixun LI <[e-mail]>
Reviewed-by: Claudiu Beznea <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/at91/sama5d2.c

···
 	if (IS_ERR(regmap))
 		return;
 
-	sama5d2_pmc = pmc_data_allocate(PMC_AUDIOPLLCK + 1,
+	sama5d2_pmc = pmc_data_allocate(PMC_AUDIOPINCK + 1,
 					nck(sama5d2_systemck),
 					nck(sama5d2_periph32ck),
 					nck(sama5d2_gck), 3);
···
 					     "audiopll_fracck");
 	if (IS_ERR(hw))
 		goto err_free;
+
+	sama5d2_pmc->chws[PMC_AUDIOPINCK] = hw;
 
 	hw = at91_clk_register_audio_pll_pmc(regmap, "audiopll_pmcck",
 					     "audiopll_fracck");

include/dt-bindings/clock/at91.h

···
 #define PMC_PLLACK		7
 #define PMC_PLLBCK		8
 #define PMC_AUDIOPLLCK		9
+#define PMC_AUDIOPINCK		10
 
 /* SAMA7G5 */
 #define PMC_CPUPLL		(PMC_MAIN + 1)