[PATCH] fix for sparse warning

[Harinath Nampally]

 To fix the below warning added static qualifier 
 "warning: symbol 'verify_sha256_digest' was not
 declared" 

Signed-off-by: Harinath Nampally <harinath922@xxxxxxxxx>
---
 arch/x86/purgatory/purgatory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
index 25e068b..c58a31f 100644
--- a/arch/x86/purgatory/purgatory.c
+++ b/arch/x86/purgatory/purgatory.c
@@ -39,7 +39,7 @@ static int copy_backup_region(void)
 	return 0;
 }
 
-int verify_sha256_digest(void)
+static int verify_sha256_digest(void)
 {
 	struct sha_region *ptr, *end;
 	u8 digest[SHA256_DIGEST_SIZE];
-- 
2.7.4