netfilter: ipvs: Fix invalid bytes in IP_VS_MH_TAB_INDEX help text

netfilter: ipvs: Fix invalid bytes in IP_VS_MH_TAB_INDEX help text

The help text contains several \xa0 bytes, which are not valid UTF-8
characters but could have been non-breaking spaces in Latin 1
encoding.  I see no reason to use non-breaking spaces here, so replace
them with regular spaces.

Fixes: 30edf801d7ed ("netfilter: ipvs: Add configurations of Maglev hashing")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name netfilter-ipvs-Fix-invalid-bytes-in-IP_VS_MH_TAB_IND.patch