KVM: arm64: Get rid of find_reg_by_id()

This helper doesn't have a user anymore, let's get rid of it.
Signed-off-by: NMarc Zyngier <maz@kernel.org>

arch/arm64/kvm/sys_regs.c

@@ -2577,17 +2577,6 @@ static bool index_to_params(u64 id, struct sys_reg_params *params)
 	}
 }
 
-const struct sys_reg_desc *find_reg_by_id(u64 id,
-					  struct sys_reg_params *params,
-					  const struct sys_reg_desc table[],
-					  unsigned int num)
-{
-	if (!index_to_params(id, params))
-		return NULL;
-
-	return find_reg(params, table, num);
-}
-
 const struct sys_reg_desc *get_reg_by_id(u64 id,
 					 const struct sys_reg_desc table[],
 					 unsigned int num)

arch/arm64/kvm/sys_regs.h

@@ -190,11 +190,6 @@ find_reg(const struct sys_reg_params *params, const struct sys_reg_desc table[],
 	return __inline_bsearch((void *)pval, table, num, sizeof(table[0]), match_sys_reg);
 }
 
-const struct sys_reg_desc *find_reg_by_id(u64 id,
-					  struct sys_reg_params *params,
-					  const struct sys_reg_desc table[],
-					  unsigned int num);
-
 const struct sys_reg_desc *get_reg_by_id(u64 id,
 					 const struct sys_reg_desc table[],
 					 unsigned int num);