Warning with unaligned memory access when building in GCC version (9.1.0)

[ramonhpr]

Problems with unaligned memory access detected by GCC newer version (9.1.0, on arch-linux)
https://www.kernel.org/doc/Documentation/unaligned-memory-access.txt

tools/sniffer.c: In function ‘decode_raw’:
tools/sniffer.c:62:17: error: taking address of packed member of ‘struct nrf24_ll_keepalive’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
   62 |   nrf24_mac2str(&kpalive->src_addr, src);
      |                 ^~~~~~~~~~~~~~~~~~
tools/sniffer.c:63:17: error: taking address of packed member of ‘struct nrf24_ll_keepalive’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
   63 |   nrf24_mac2str(&kpalive->dst_addr, dst);
      |                 ^~~~~~~~~~~~~~~~~~
tools/sniffer.c: In function ‘decode_mgmt’:
tools/sniffer.c:115:17: error: taking address of packed member of ‘struct nrf24_ll_presence’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
  115 |   nrf24_mac2str(&ll->mac, src);
      |                 ^~~~~~~~
tools/sniffer.c:131:17: error: taking address of packed member of ‘struct nrf24_ll_mgmt_connect’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
  131 |   nrf24_mac2str(&llcn->src_addr, src);
      |                 ^~~~~~~~~~~~~~~
tools/sniffer.c:132:17: error: taking address of packed member of ‘struct nrf24_ll_mgmt_connect’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
  132 |   nrf24_mac2str(&llcn->dst_addr, dst);
      |                 ^~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[1]: *** [Makefile:864: tools/sniffer-sniffer.o] Error 1
make: *** [Makefile:939: install-recursive] Error 1