PKCS#7: fix sparse non static symbol warning
PKCS#7: fix sparse non static symbol warning

Fixes the following sparse warnings:

crypto/asymmetric_keys/pkcs7_key_type.c:73:17: warning:
 symbol 'key_type_pkcs7' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <b8f9cab8be13de37b9588aedad10a20fc3a68783@trendmicro.com.cn>
Signed-off-by: David Howells <ebac1d06c1688626821bb0e574a037a7a5354e49@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs