soc: qcom: preserve CPU endianness for QMI_DATA_LEN

soc: qcom: preserve CPU endianness for QMI_DATA_LEN

To ensure correct handling of endianness in the QMI subsystem, the
QMI_DATA_LEN field used in host-side drivers remains in CPU-native byte
order. Remove unnecessary endianness conversions, considering that
QMI_DATA_LEN is always of type `u32` on the host. On the QMI wire
interface, however, its representation is variable and may use either 1 or
2 bytes.

Signed-off-by: Alexander Wilhelm <alexander.wilhelm@westermo.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20251119104008.3505152-4-alexander.wilhelm@westermo.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>