Add common helpers for reading and parsing standard LPDDR2 configuration
properties.
Signed-off-by: NDmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20211006224659.21434-9-digetx@gmail.comSigned-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>