MEDIUM: lbprm: store algo params on 32bits

MEDIUM: lbprm: store algo params on 32bits

Make sure lbprm.algo can store 32bits by declaring it as uint32_t

Then, use all 32 available bits to offer 4 extra bits for the BE_LB_NEED
inputs. This will allow new required inputs to be easily added (up to 4
new ones, plus one that wasn't used yet if we keep them exclusive)

This required some cleanup: all ALGO bitfields were rewritten in the
32bits format and the high ones were shifted to make room for the
new BE_LB_NEED bits.