wimax/i2400m: fix missing endian correction read in fw loader

i2400m_fw_hdr_check() was accessing hardware field
bcf_hdr->module_type (little endian 32) without converting to host
byte sex.

Reported-by: Данилин Михаил <mdanilin@nsg.net.ru>

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>