[PATCH v3 08/22] x86, ACPI: Make acpi_initrd_override_find work with 32bit flat mode

For finding with 32bit, it would be easy to access initrd in 32bit flat mode, as we don't need to set page table. That is from head_32.S, and microcode updating already use this trick. Need to change acpi_initrd_override_find to use phys to access global variables. Pass is_phys in the function,

[PATCH v3 08/22] x86, ACPI: Make acpi_initrd_override_find work with 32bit flat mode

For finding with 32bit, it would be easy to access initrd in 32bit flat mode, as we don't need to set page table. That is from head_32.S, and microcode updating already use this trick. Need to change acpi_initrd_override_find to use phys to access global variables. Pass is_phys in the function,