linux-cp: Fix endianness in lcp response

linux-cp: Fix endianness in lcp response

Creation of LCP will return garbled host_sw_if_index of the newly
created TAP interface.

Example PAPI code:
```
lcp_add = vpp.api.lcp_itf_pair_add_del_v2(is_add=True, sw_if_index=17,
          host_if_type=VppEnum.vl_api_lcp_itf_host_type_t.LCP_API_ITF_HOST_TAP,
          host_if_name="loop0", netns="dataplane")
print(lcp_add)

lcp_ret = vpp.api.lcp_itf_pair_get()
print(lcp_ret)
```

Before, the returned host_sw_if_index has the wrong endianness:
VPP version is 23.02-rc0~212-gf06a518f8
lcp_itf_pair_add_del_v2_reply(_0=103, context=2, retval=0, host_sw_if_index=301989888)
(lcp_itf_pair_get_reply(_0=105, context=3, retval=0, cursor=4294967295),[lcp_itf_pair_details(_0=106, context=3, phy_sw_if_index=17, host_sw_if_index=18, vif_index=594, host_if_name='loop0', host_if_type=<vl_api_lcp_itf_host_type_t.LCP_API_ITF_HOST_TAP: 0>, netns='dataplane')])

After, it is correctly showing idx 18:
VPP version is 23.02-rc0~212-gf06a518f8
lcp_itf_pair_add_del_v2_reply(_0=103, context=2, retval=0, host_sw_if_index=18)
(lcp_itf_pair_get_reply(_0=105, context=3, retval=0, cursor=4294967295), [lcp_itf_pair_details(_0=106, context=3, phy_sw_if_index=17, host_sw_if_index=18, vif_index=595, host_if_name='loop0', host_if_type=<vl_api_lcp_itf_host_type_t.LCP_API_ITF_HOST_TAP: 0>, netns='dataplane')])

Type: fix
Signed-off-by: pim@ipng.nl
Change-Id: I9085bac0c4a9ad64356c67f9b85f4910131e349e