clk: spacemit: ccu_pll: fix error return value in recalc_rate callback

Return 0 instead of -EINVAL if function ccu_pll_recalc_rate() fails to
get correct rate entry. Follow .recalc_rate callback documentation
as mentioned in include/linux/clk-provider.h for error return value.

Signed-off-by: Akhilesh Patil <akhilesh@ee.iitb.ac.in>
Fixes: 1b72c59 ("clk: spacemit: Add clock support for SpacemiT K1 SoC")
Reviewed-by: Haylen Chu <heylenay@4d2.org>
Reviewed-by: Alex Elder <elder@riscstar.com>
Link: https://lore.kernel.org/r/aIBzVClNQOBrjIFG@bhairav-test.ee.iitb.ac.in
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: Akhilesh Patil

drivers/clk/spacemit/ccu_pll.c

@@ -122,7 +122,7 @@ static unsigned long ccu_pll_recalc_rate(struct clk_hw *hw,
 
 	WARN_ON_ONCE(!entry);
 
-	return entry ? entry->rate : -EINVAL;
+	return entry ? entry->rate : 0;
 }
 
 static long ccu_pll_round_rate(struct clk_hw *hw, unsigned long rate,