pcu_sock.c: Avoid breaking strict-aliasing on ptr derreference

Fixes following warning:
pcu_sock.c: In function 'pcu_rx_data_req':
pcu_sock.c:406:3: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
   tlli = *((uint32_t *)data_req->data);
   ^

Change-Id: I5c93487c72d15b061e73ed4f9acbf2e77dec967a
1 file changed