arm64: module: Make plt_equals_entry() static

Since commit 4e69ecf4da ("arm64/module: ftrace: deal with place
relative nature of PLTs"), plt_equals_entry() is not used outside of
module-plts.c, so make it static.

Signed-off-by: Li Huafei <lihuafei1@huawei.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220929094134.99512-2-lihuafei1@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/include/asm/module.h

@@ -58,7 +58,6 @@ static inline bool is_forbidden_offset_for_adrp(void *place)
 }
 
 struct plt_entry get_plt_entry(u64 dst, void *pc);
-bool plt_entries_equal(const struct plt_entry *a, const struct plt_entry *b);
 
 static inline bool plt_entry_is_initialized(const struct plt_entry *e)
 {

arch/arm64/kernel/module-plts.c

@@ -37,7 +37,8 @@ struct plt_entry get_plt_entry(u64 dst, void *pc)
 	return plt;
 }
 
-bool plt_entries_equal(const struct plt_entry *a, const struct plt_entry *b)
+static bool plt_entries_equal(const struct plt_entry *a,
+			      const struct plt_entry *b)
 {
 	u64 p, q;