Right now the code explicitly limits us to sha1,256 hashes with RSA2048
encryption. But the limitation is artificial since U-Boot supports
a wider range of algorithms.
The internal image_get_[checksum|crypto]_algo() functions expect an
argument in the format of <checksum>,<crypto>. So let's remove the size
checking and create the needed string on the fly in order to support
more hash/signing combinations.
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
8699af63b8