clk: renesas: cpg-lib: Use DEFINE_SPINLOCK() for global spinlock

A global spinlock can be initialized automatically with
DEFINE_SPINLOCK() rather than explicitly calling spin_lock_init().
Suggested-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/9073a6bfb7791e492156331fa8a0ea87a7c7cef6.1716975021.git.geert+renesas@glider.be

drivers/clk/renesas/rcar-cpg-lib.c

@@ -22,7 +22,7 @@
 
 #include "rcar-cpg-lib.h"
 
-spinlock_t cpg_lock;
+DEFINE_SPINLOCK(cpg_lock);
 
 void cpg_reg_modify(void __iomem *reg, u32 clear, u32 set)
 {

drivers/clk/renesas/rcar-gen3-cpg.c

@@ -551,7 +551,5 @@ int __init rcar_gen3_cpg_init(const struct rcar_gen3_cpg_pll_config *config,
 		cpg_quirks = (uintptr_t)attr->data;
 	pr_debug("%s: mode = 0x%x quirks = 0x%x\n", __func__, mode, cpg_quirks);
 
-	spin_lock_init(&cpg_lock);
-
 	return 0;
 }

drivers/clk/renesas/rcar-gen4-cpg.c

@@ -466,7 +466,5 @@ int __init rcar_gen4_cpg_init(const struct rcar_gen4_cpg_pll_config *config,
 	cpg_clk_extalr = clk_extalr;
 	cpg_mode = mode;
 
-	spin_lock_init(&cpg_lock);
-
 	return 0;
 }