libsdhcdrivers: Switch clock rate after init

To improve the performance of the driver,
the clock settings need to be adjusted to an
operational setting after the init process has finished.

Signed-off-by: Matthias Buhl <matthias.buhl@hensoldt-cyber.de>

libsdhcdrivers: Actively initialize bus width

The default bus width of the card after power up or GO_IDLE (CMD0) is
1 bit. As the HostController is initialzed to 4-bit bus width,
the card also needs to switch to 4-bit mode.

libsdhcdrivers: Applying formatting

Files that are going to be changes in the future commits got
formatted.

Fix licenses