staging: wfx: fix endianness of hif_req_read_mib fields

The structs hif_{req,cnf}_read_mib contain only little endian values.
Thus, it is necessary to fix byte ordering before to use them.
Especially, sparse detected wrong accesses to fields mib_id and length.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200512150414.267198-8-Jerome.Pouiller@silabs.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>