soc: qcom: fix endianness for QMI header

soc: qcom: fix endianness for QMI header

The members of QMI header have to be swapped on big endian platforms. Use
__le16 types instead of u16 ones.

Signed-off-by: Alexander Wilhelm <alexander.wilhelm@westermo.com>
Fixes: 9b8a11e82615 ("soc: qcom: Introduce QMI encoder/decoder")
Fixes: 3830d0771ef6 ("soc: qcom: Introduce QMI helpers")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250522143530.3623809-3-alexander.wilhelm@westermo.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>