samples: zperf: fix an unaligned access in the UDP uploader

zperf takes a potentially unaligned netowrk packet, casts it to a
struct, and then dereferences the fields.  This causes a crash on
cores that don't support unaligned access such as the Cortex-M0+.

Use the UNALIGNED_GET helper instead.

Signed-off-by: Michael Hope <mlhx@google.com>
1 file changed