Defines starting with `h' in osfmk/ppc

• _HARDCLOCK_ENTRIES_H_ osfmk/ppc/hardclock_entries.h:27
• hash1 osfmk/ppc/asm.h:127
• hash2 osfmk/ppc/asm.h:128
• hid0 osfmk/ppc/asm.h:134
• hid1 osfmk/ppc/asm.h:136
• HPV_BUFFER_END osfmk/ppc/new_screen.h:35
• HPV_BUFFER_START osfmk/ppc/new_screen.h:34
• _HW_COUNTERS_H_ osfmk/ppc/hw_counters.h:27
• HZ osfmk/ppc/mach_param.h:57