configs: enable X86 PM timer support

The PM timer is availiable in case of ACPI is unusable or blacklisted.
So let's enable it as a fallback timer when APIC timer goes wrong.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>
Reviewed-by: NDust Li <dust.li@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

config-4.19.y-x86_64

@@ -501,7 +501,7 @@ CONFIG_ACPI_EXTLOG=m
 CONFIG_ACPI_ADXL=y
 # CONFIG_PMIC_OPREGION is not set
 # CONFIG_ACPI_CONFIGFS is not set
-# CONFIG_X86_PM_TIMER is not set
+CONFIG_X86_PM_TIMER=y
 # CONFIG_SFI is not set
 
 #

config-4.19.y-x86_64-debug

@@ -506,7 +506,7 @@ CONFIG_ACPI_EXTLOG=m
 CONFIG_ACPI_ADXL=y
 # CONFIG_PMIC_OPREGION is not set
 # CONFIG_ACPI_CONFIGFS is not set
-# CONFIG_X86_PM_TIMER is not set
+CONFIG_X86_PM_TIMER=y
 # CONFIG_SFI is not set
 
 #