bugfix: ipsec: nist ecp521 elliptic curve support
bugfix: ipsec: nist ecp521 elliptic curve support

There was a small typo the vpn_ipsec_convert_to_modp() function.

Bug introduced in commit 7a747654e9ef5b4cec7184c770a24bd1e184ea6e

Signed-off-by: Bruno Thomsen <aea5195c0d593b733bbc532a3448f6e7d3519002@gmail.com>

jxmx/pfsense,ptorsten/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,ch1c4um/pfsense,dennypage/pfsense,BlackstarGroup/pfsense,phil-davis/pfsense,pfsense/pfsense,ptorsten/pfsense,pfsense/pfsense,dennypage/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,jxmx/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,brunostein/pfsense,BlackstarGroup/pfsense,NOYB/pfsense,pfsense/pfsense,brunostein/pfsense,NOYB/pfsense,phil-davis/pfsense,NOYB/pfsense,phil-davis/pfsense,pfsense/pfsense,jxmx/pfsense,ch1c4um/pfsense,ch1c4um/pfsense,dennypage/pfsense,ch1c4um/pfsense,dennypage/pfsense,brunostein/pfsense