rtc + pci: CMOS clock with date command, PCI bus enumeration

- rtc.rs: read the PC RTC via CMOS ports 0x70/0x71 (UIP wait, BCD/12h
  normalization, century sanity-check with 2000+ fallback); boot prints
  the wall clock, shell gains 'date'
- pci.rs: legacy config-space access (0xCF8/0xCFC) with full enumeration
  of buses 0-255; boot reports device count, shell gains 'pci' (lspci
  style listing with class names)
- QEMU q35 verified: Q35 host bridge, stdvga, e1000, ICH9 LPC

1 files changed, 2 insertions, 0 deletions

diff --git a/rsnix/src/lib.rs b/rsnix/src/lib.rs
index 8c69b35..f84fa73 100644
--- a/rsnix/src/lib.rs
+++ b/rsnix/src/lib.rs
@@ -7,7 +7,9 @@ pub mod gop;
 pub mod interrupts;
 pub mod memory;
 pub mod paging;
+pub mod pci;
 pub mod power;
 pub mod ps2;
+pub mod rtc;
 pub mod serial;
 pub mod uefi;