Auto merge of #126852 - scottmcm:more-checked-math-tweaks, r=Amanieu #47061

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10 warnings

struct `RoutingData` is never constructed

struct `zx_packet_page_request_t` is never constructed

struct `zx_system_powerctl_arg_t` is never constructed

struct `zx_pci_bar_t` is never constructed

struct `zx_smc_parameters_t` is never constructed

struct `zx_smc_result_t` is never constructed

constant `ZX_CPU_SET_MAX_CPUS` is never used

constant `ZX_CPU_SET_BITS_PER_WORD` is never used

struct `zx_cpu_set_t` is never constructed