(for test)Add i945G based mainboard

A try to enable both of EPG and IGD.

Change-Id: I5398b990c26d087afb20e4b1028a7a1cad4b3ee3
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
---
M src/cpu/intel/Kconfig
A src/cpu/intel/model_f6x/Kconfig
A src/cpu/intel/model_f6x/Makefile.inc
A src/cpu/intel/model_f6x/model_f6x_init.c
M src/cpu/intel/socket_LGA775/Kconfig
M src/cpu/intel/socket_LGA775/Makefile.inc
M src/cpu/intel/speedstep/speedstep.c
A src/mainboard/nec/945g-m4/Kconfig
A src/mainboard/nec/945g-m4/Kconfig.name
A src/mainboard/nec/945g-m4/Makefile.inc
A src/mainboard/nec/945g-m4/acpi/ec.asl
A src/mainboard/nec/945g-m4/acpi/ich7_pci_irqs.asl
A src/mainboard/nec/945g-m4/acpi/mainboard.asl
A src/mainboard/nec/945g-m4/acpi/superio.asl
A src/mainboard/nec/945g-m4/acpi_tables.c
A src/mainboard/nec/945g-m4/board_info.txt
A src/mainboard/nec/945g-m4/cmos.default
A src/mainboard/nec/945g-m4/cmos.layout
A src/mainboard/nec/945g-m4/cstates.c
A src/mainboard/nec/945g-m4/devicetree.cb
A src/mainboard/nec/945g-m4/dsdt.asl
A src/mainboard/nec/945g-m4/early_init.c
A src/mainboard/nec/945g-m4/gpio.c
A src/mainboard/nec/945g-m4/hda_verb.c
A src/mainboard/nec/Kconfig
A src/mainboard/nec/Kconfig.name
M src/northbridge/intel/i945/early_init.c
M src/northbridge/intel/i945/gma.c
M src/northbridge/intel/i945/northbridge.c
M src/northbridge/intel/i945/raminit.c
30 files changed, 952 insertions(+), 63 deletions(-)