efi: Add missing prototype for efi_capsule_setup_info

[ Upstream commit aa48037 ]

Fixes "no previous declaration for 'efi_capsule_setup_info'" warnings
under W=1.

Fixes: 2959c95 ("efi/capsule: Add support for Quark security header")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Link: https://lore.kernel.org/r/c28d3f86-dd72-27d1-e2c2-40971b8da6bd@siemens.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

include/linux/efi.h

@@ -167,6 +167,8 @@ struct capsule_info {
 	size_t			page_bytes_remain;
 };
 
+int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff,
+                           size_t hdr_bytes);
 int __efi_capsule_setup_info(struct capsule_info *cap_info);
 
 typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);