clk: bcm2835: Allow custom CCF flags for the PLLs

While some clock types allow for each clock to specify its own custom
flags, the PLLs can't. We will need this for the PLLB, so let's add it.
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/ae8bd505d8851f6646e244cd76b6b289346973c8.1592210452.git-series.maxime@cerno.techSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/bcm/clk-bcm2835.c

@@ -421,6 +421,7 @@ struct bcm2835_pll_data {
 	u32 reference_enable_mask;
 	/* Bit in CM_LOCK to indicate when the PLL has locked. */
 	u32 lock_mask;
+	u32 flags;
 
 	const struct bcm2835_pll_ana_bits *ana;
 
@@ -1310,7 +1311,7 @@ static struct clk_hw *bcm2835_register_pll(struct bcm2835_cprman *cprman,
 	init.num_parents = 1;
 	init.name = pll_data->name;
 	init.ops = &bcm2835_pll_clk_ops;
-	init.flags = CLK_IGNORE_UNUSED;
+	init.flags = pll_data->flags | CLK_IGNORE_UNUSED;
 
 	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
 	if (!pll)