Add acpi_get_sleep_type() to i82371eb and P2B _PTS/_WAK methods

Add acpi_get_sleep_type() to i82371eb and P2B _PTS/_WAK methods

Build fix for src/arch/i386/boot/acpi.c if !CONFIG_SMP
Also check for acpi_slp_type 2 in acpi_is_wakeup, since S2
uses the same acpi wakeup vector as S3.
Add _PTS/_WAK methods to turn off/on the CPU/case fans and blink
the power LED while sleeping.
acpi_get_sleep_type() is in a seperate file i82371eb_wakeup.c because
it is used in both romstage and ramstage after patch 3/3, whereas
i82371eb_early_pm.c is used only in romstage.
I used the name acpi_get_sleep_type instead of  acpi_is_wakeup_early
because I think acpi_is_wakeup_early is a bit misleading as a name since it
doesn't return a boolean value.

Other chipsets so far only ever set acpi_slp_type to 0 and 3, so the
added check for acpi_slp_type == 2 (resume from S2) should not
change behaviour of other boards:
northbridge/intel/i945/northbridge.c:256:extern u8 acpi_slp_type;
northbridge/intel/i945/northbridge.c:263: acpi_slp_type=0;
northbridge/intel/i945/northbridge.c:267: acpi_slp_type=3;
northbridge/intel/i945/northbridge.c:271: acpi_slp_type=0;
southbridge/intel/i82801gx/i82801gx_lpc.c:171:extern u8 acpi_slp_type;
southbridge/via/vt8237r/vt8237r_lpc.c:149:extern u8 acpi_slp_type;
southbridge/via/vt8237r/vt8237r_lpc.c:238:  acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
southbridge/via/vt8237r/vt8237r_lpc.c:239:  printk(BIOS_DEBUG, "SLP_TYP type was %x %x\n", tmp, acpi_slp_type);

Change-Id: I13feff0b8f49aa988e5467cdbef02981f0a6be8a
Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/188
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>