product/rdn2: update the sds config data

The SDS module element data had couple of stale entries
(PLATFORM_SDS_CPU_BOOTCTR and PLATFORM_SDS_CPU_FLAGS) which are not used
by subsequent stages of boot and so these entries are removed. The SDS
descriptor ID have also been updated and this aligns with the next
stages of boot. The firmware version entries are split into SCP ROM and
RAM firmware versions.

Change-Id: Iaa74e735a24c7522a5e56ec2d60c4e9bad0650bf
Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>