arch: arm64: Add Cortex-R82 config
arch: arm64: Add Cortex-R82 config

Add Cortex-R82 config to support the Cortex-R82 processor.
Introduce the new CPU_CORTEX_R_AARCH64 config for the Cortex-R 64-bit
processor.

Since the current CPU_CORTEX_R config has already been bound for
AArch32 in many test cases, we therefore add a new CPU_AARCH64_CORTEX_R
to distinguish from the Cortex-R 32-bit processor.
We do not use CPU_CORTEX_R64 because this name will lead to ambiguity
with processor name like Cortex-R82.

Signed-off-by: Jaxson Han <70391990969cde8f4f4c008c74e601e9ed3959a1@arm.com>

galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,nashif/zephyr,Vudentz/zephyr,finikorg/zephyr,Vudentz/zephyr,nashif/zephyr,nashif/zephyr,Vudentz/zephyr,Vudentz/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,nashif/zephyr,Vudentz/zephyr,galak/zephyr