spki: remove unnecessary cast of void pointer in key_entry_cmp()
spki: remove unnecessary cast of void pointer in key_entry_cmp()

When a void * is assigned to pointer of another type, it's not required
to do a cast. It also fixes that the const type of the parameters were
removed in the cast.

rtrlib/rtrlib,rtrlib/rtrlib,rtrlib/rtrlib