plat/arm: Pass cookie argument down to arm_get_rotpk_info()

The cookie will be leveraged in the next commit.

Change-Id: Ie8bad275d856d84c27466461cf815529dd860446
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/plat/arm/board/sgi575/sgi575_trusted_boot.c b/plat/arm/board/sgi575/sgi575_trusted_boot.c
index c271f7f..4592b8f 100644
--- a/plat/arm/board/sgi575/sgi575_trusted_boot.c
+++ b/plat/arm/board/sgi575/sgi575_trusted_boot.c
@@ -22,5 +22,5 @@
 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
 			unsigned int *flags)
 {
-	return arm_get_rotpk_info(key_ptr, key_len, flags);
+	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
 }