Record acpi_rsdp

struct acpi_rsdp {
  uacpi_char[8] signature;
  uacpi_u8 checksum;
  uacpi_char[6] oemid;
  uacpi_u8 revision;
  uacpi_u32 rsdt_addr;
  uacpi_u32 length;
  uacpi_u64 xsdt_addr;
  uacpi_u8 extended_checksum;
  uacpi_u8[3] rsvd;
  /* Full declaration omitted */ 
}