acpi/acpi_pm.c: refactor acpi_pm_state_for_* functions

Use just one function to get the chipset powerstate and add an argument
to specify the powerstate claimer {RTC,ELOG,WAKE} and adjust the
failure log accordingly.

TEST: compile tested and qemu emulation successfully run

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Change-Id: I8addc0b05f9e360afc52091c4bb731341d7213cf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67618
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/include/acpi/acpi_pm.h

@@ -3,10 +3,16 @@
 #ifndef ACPI_PM_H
 #define ACPI_PM_H
 
+enum power_state_claimer {
+	PS_CLAIMER_ELOG,
+	PS_CLAIMER_RTC,
+	PS_CLAIMER_WAKE,
+	PS_CLAIMER_MAX /* Not a valid value, needs to be last element */
+};
+
 struct chipset_power_state;
 struct chipset_power_state *acpi_get_pm_state(void);
-int acpi_pm_state_for_elog(const struct chipset_power_state **ps);
-int acpi_pm_state_for_rtc(const struct chipset_power_state **ps);
-int acpi_pm_state_for_wake(const struct chipset_power_state **ps);
+int acpi_fetch_pm_state(const struct chipset_power_state **ps,
+		  enum power_state_claimer ps_claimer);
 
 #endif