xen/arm: Change the variable type of cpu_logical_map to register_t

xen/arm: Change the variable type of cpu_logical_map to register_t

The cpu_logical_map is used to store CPU hardware ID from MPIDR_EL1 or
from CPU node of DT. Currently, the cpu_logical_map is using the u32 as
its variable type. It can work properly while Xen is running on ARM32,
because the hardware ID is 32-bits. While Xen is running on ARM64, the
hardware ID expands to 64-bits and then the cpu_logical_map will overflow.

Change the variable type of cpu_logical_map to register_t will make
cpu_logical_map to store hardware IDs correctly on ARM32 and ARM64.

Signed-off-by: Wei Chen <Wei.Chen@linaro.org>
Acked-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>