staging: wimax: i2400m: fix some incorrect type warnings

staging: wimax: i2400m: fix some incorrect type warnings

Fix some "incorrect type in assignment" warnings reported by sparse in fw.c

sparse warnings:
wimax/i2400m/fw.c:266:27: warning: cast to restricted __le32
wimax/i2400m/fw.c:266:25: warning: incorrect type in assignment (different base types)
wimax/i2400m/fw.c:267:27: warning: cast to restricted __le32
wimax/i2400m/fw.c:267:25: warning: incorrect type in assignment (different base types)
wimax/i2400m/fw.c:268:27: warning: cast to restricted __le32
wimax/i2400m/fw.c:268:25: warning: incorrect type in assignment (different base types)
wimax/i2400m/fw.c:269:27: warning: cast to restricted __le32
wimax/i2400m/fw.c:269:25: warning: incorrect type in assignment (different base types)

Signed-off-by: Darryl T. Agostinelli <dagostinelli@gmail.com>
Link: https://lore.kernel.org/r/20210308144839.2364329-1-dagostinelli@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>