driver/sensor: lis2mdl: (FIX) change 'uint32_t' type into 'u32_t'

In zephyr drivers should always use u32_t.
Using uint32_t here generates issues in the CI when NEWLIB_LIBC
is defined.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
1 file changed