MAINTAINERS: Update the maintainers for ARM64 ACPI

MAINTAINERS: Update the maintainers for ARM64 ACPI

ARM64 ACPI patches go via ARM64 tree, but the listed maintainers
for ARM64 ACPI don't include Catalin and Will, and there is no
F: line under the ARM64 architecture entry, so emails will not
route to Catalin and Will in an automatic way.

Adding Catalin and Will to the maintainers entry for ARM64 ACPI
to fix the problem, it will make life easy for merging ARM64 ACPI
patches.

Adding new maintainer entries for ARM64 ACPI doesn't mean the review
work will balance to the new maintainer, patches still need to be
acked by currently listed folks (Lorenzo, Hanjun, Sudeep) before
merging them.

Link: https://lore.kernel.org/linux-acpi/aS2ZTfS9YVO98Exe@willie-the-truck/
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Acked-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>