soc/amd/*/acpi: drop unneeded pstate_cnt FADT assignment

The FADT data structure is zero-initialized in acpi_create_fadt which
then calls the SoC-specific acpi_fill_fadt function, therefore it's not
needed to assign 0 to the pstate_cnt FADT field in acpi_fill_fadt.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: If3ddb466de1d437361d811e45e328a1dbff02fcc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73419
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>

src/soc/amd/cezanne/acpi.c

@@ -62,8 +62,6 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 		fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
 	}
 
-	fadt->pstate_cnt = 0;
-
 	fadt->pm1a_evt_blk = ACPI_PM_EVT_BLK;
 	fadt->pm1a_cnt_blk = ACPI_PM1_CNT_BLK;
 	fadt->pm_tmr_blk = ACPI_PM_TMR_BLK;

src/soc/amd/glinda/acpi.c

@@ -65,8 +65,6 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 		fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
 	}
 
-	fadt->pstate_cnt = 0;
-
 	fadt->pm1a_evt_blk = ACPI_PM_EVT_BLK;
 	fadt->pm1a_cnt_blk = ACPI_PM1_CNT_BLK;
 	fadt->pm_tmr_blk = ACPI_PM_TMR_BLK;

src/soc/amd/mendocino/acpi.c

@@ -64,8 +64,6 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 		fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
 	}
 
-	fadt->pstate_cnt = 0;
-
 	fadt->pm1a_evt_blk = ACPI_PM_EVT_BLK;
 	fadt->pm1a_cnt_blk = ACPI_PM1_CNT_BLK;
 	fadt->pm_tmr_blk = ACPI_PM_TMR_BLK;

src/soc/amd/phoenix/acpi.c

@@ -65,8 +65,6 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 		fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
 	}
 
-	fadt->pstate_cnt = 0;
-
 	fadt->pm1a_evt_blk = ACPI_PM_EVT_BLK;
 	fadt->pm1a_cnt_blk = ACPI_PM1_CNT_BLK;
 	fadt->pm_tmr_blk = ACPI_PM_TMR_BLK;