feat(s32g274ardb): initialize the uSDHC driver

S32G2 and IMX share the same uSDHC controller. Therefore, it is
initialized during BL2 to facilitate the loading of subsequent boot
stages.

Change-Id: I223904c24a14a89ef676626b54a5937f39a17eda
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
3 files changed