clk: ti: Fix some errors found by static checkers

drivers/clk/ti/clk-814x.c:34:12: warning: symbol 'dm814x_adpll_early_init' was not declared. Should it be static?
drivers/clk/ti/clk-814x.c:58:12: warning: symbol 'dm814x_adpll_enable_init_clocks' was not declared. Should it be static?
drivers/clk/ti/adpll.c:465 ti_adpll_recalc_rate() warn: should '__readw(d->regs + 20) << 18' be a 64 bit type?
drivers/clk/ti/adpll.c:945 ti_adpll_probe() error: we previously assumed 'd->clocks' could be null (see line 921)

The last one looks like a real bug because we don't return an
error on allocation failure.

Cc: Tero Kristo <[e-mail]>
Tested-by: Tony Lindgren <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/ti/adpll.c

···
 	spin_lock_irqsave(&d->lock, flags);
 	frac_m = readl_relaxed(d->regs + ADPLL_FRACDIV_OFFSET);
 	frac_m &= ADPLL_FRACDIV_FRACTIONALM_MASK;
-	rate = readw_relaxed(d->regs + ADPLL_MN2DIV_OFFSET) << 18;
+	rate = (u64)readw_relaxed(d->regs + ADPLL_MN2DIV_OFFSET) << 18;
 	rate += frac_m;
 	rate *= parent_rate;
 	divider = (readw_relaxed(d->regs + ADPLL_M2NDIV_OFFSET) + 1) << 18;
···
 				 TI_ADPLL_NR_CLOCKS,
 				 GFP_KERNEL);
 	if (!d->clocks)
-		goto free;
+		return -ENOMEM;
 
 	err = ti_adpll_init_dco(d);
 	if (err) {

drivers/clk/ti/clk-814x.c

···
 
 static bool timer_clocks_initialized;
 
-int __init dm814x_adpll_early_init(void)
+static int __init dm814x_adpll_early_init(void)
 {
 	struct device_node *np;
 
···
 	"pll290clkout",		/* DDR 481c5290.adpll.clkout */
 };
 
-int __init dm814x_adpll_enable_init_clocks(void)
+static int __init dm814x_adpll_enable_init_clocks(void)
 {
 	int i, err;