libsdhcdrivers: Apply formatting

Adapted source file to fit the formatting rules.

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

libsdhcdrivers: Unify log messages

The driver used a mixture of deprecated logging
macros and direct calls to printf(). All this was
unified to the ZF_... logging macros.

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

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: Improve card capacity calculation

* Integer overflow is now avoided.
* Switch case is more readable.

libsdhcdrivers: Add CSD version macros

To improve readability and to avoid future errors CSD version is now
abstracted with macros.

libsdhcdrivers: Change mmc_card_capacity type

mmc_card_capacity will now return signed value due to the following
reasons:

1. Function returns negative value in case of the failure, so naturally
signed type must be used.
2. Signed 64 bit value is enough for holding the theoretical SD card
size of 8 EiB (2^63 = 2^3 * 2^60 = 2^3 * 1024 ^ 6) what is more than
enough when taking into account that the latest SDUC format maximum
size is 128 TiB (2^7 * 1024^4).

libsdhcdrivers: Rename mmc's transfer block size

`bs` was not descriptive enough, and `block_size` helps to avoid
confusion.

Further more variable is marked as const and assigned during the
declaration.

libsdhcdrivers: Improve read/write arg evaluation

Transfer command's argument is now evaluated with a help of ternary
operator so that it can be marked as const, and logic is more compact.

libsdhcdrivers: Improve read and write functions

Code was refactor so that it is more bulletproof to memory leak as
clean is done only at the exit of the function or in the callback.

libsdhcdrivers: Free allocated memory

If no callback is given, command must be destroyed prior to returning
from the function.

libsdhcdrivers: Extract write and read commands

Write and read commands share the same logic with only the command
being the difference thus logic can be extracted.

libsdhcdrivers: Enable high capacity cards

High capacity cards require extra logic to be implement in order to be
supported.

libsdhcdrivers: Applying formatting

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

Fix licenses