clk: actions: owl-pll: cast delay to unsigned long for udelay()

The 'delay' field in struct owl_pll_hw is u8, but udelay() internally
compares its argument against MAX_UDELAY_MS * 1000 (2000). Since a u8
can never exceed 255, the compiler warns of a tautological comparison
that is always false:

  drivers/clk/actions/owl-pll.c:189:2: error: result of comparison of
  constant 2000 with expression of type 'u8' is always false

Cast the delay value to unsigned long to widen the type and silence the
W=1 warning without changing behavior.

Assisted-by: LLM
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Brian Masney <bmasney@redhat.com>

drivers/clk/actions/owl-pll.c

@@ -186,7 +186,7 @@ static int owl_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	regmap_write(common->regmap, pll_hw->reg, reg);
 
-	udelay(pll_hw->delay);
+	udelay((unsigned long)pll_hw->delay);
 
 	return 0;
 }