lguest: avoid using port I/O instructions

Previously a kernel on lguest runs port I/O instructions for
PS/2 (i8042), PIC (i8259), PCI and CMOS. Such I/O instructions
are emulated by the lguest driver. This commit avoid the I/O
emulation for PS/2, PIC and PCI.

Note: Turn off CONFIG_PM_TRACE_RTC option to stop CMOS accesses.