configs: rpi_arm64: build position independent code

Latest RPi5 EEPROM firmware versions after "DATE: 2023/10/30", has changed
kernel load address from 0x80000 to 0x200000 which break boot process.
Switch to position independent code to be able to boot the same binary
on top of different EEPROM firmware versions.

Tested on:
Raspberry Pi 5 Model B Rev 1.0
Raspberry Pi 4 Model B Rev 1.1
Raspberry Pi 3 Model B Plus Rev 1.3
Raspberry Pi Zero 2 W Rev 1.0
Raspberry Pi 2 Model B Rev 1.2
Raspberry Pi Compute Module 4 Rev 1.0
Raspberry Pi Compute Module 3 Rev 1.0

Tested-by: Jens Maus <mail@jens-maus.de>
Tested-by: Darko Alavanja <darko.alavanja@konsulko.com>
Signed-off-by: Ivan T. Ivanov <iivanov@suse.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>