Blackfin: export ip_compute_csum/csum_partial_copy_from_user symbols

All other arches do this, and some places like the net/scsi code will fail
as modules without them.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/lib/checksum.c b/arch/blackfin/lib/checksum.c
index 762a7f0..cd605e7 100644
--- a/arch/blackfin/lib/checksum.c
+++ b/arch/blackfin/lib/checksum.c
@@ -116,6 +116,7 @@
 {
 	return (__force __sum16)~do_csum(buff, len);
 }
+EXPORT_SYMBOL(ip_compute_csum);
 
 /*
  * copy from fs while checksumming, otherwise like csum_partial
@@ -130,6 +131,7 @@
 	memcpy(dst, (__force void *)src, len);
 	return csum_partial(dst, len, sum);
 }
+EXPORT_SYMBOL(csum_partial_copy_from_user);
 
 /*
  * copy from ds while checksumming, otherwise like csum_partial