[media] s5k4ecgx: fix sparse warnings

drivers/media/i2c/s5k4ecgx.c:223:16: warning: cast to restricted __be16
drivers/media/i2c/s5k4ecgx.c:223:16: warning: cast to restricted __be16
drivers/media/i2c/s5k4ecgx.c:223:16: warning: cast to restricted __be16
drivers/media/i2c/s5k4ecgx.c:223:16: warning: cast to restricted __be16
drivers/media/i2c/s5k4ecgx.c:344:20: warning: cast to restricted __le32
drivers/media/i2c/s5k4ecgx.c:354:20: warning: cast to restricted __le32
drivers/media/i2c/s5k4ecgx.c:364:24: warning: cast to restricted __le32
drivers/media/i2c/s5k4ecgx.c:366:23: warning: cast to restricted __le16

The get_unaligned_le*() functions return the value using cpu endianness,
so calling le*_to_cpu is wrong.

It hasn't been not noticed because this code has only been run on little
endian systems, so le*_to_cpu doesn't do anything.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>