efi: add function to determine type of device path

Thanks to the wonders of UEFI we have to walk down the
device path all the way until we arrive at the device
we got this path from...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/efi.h b/include/efi.h
index 4ad9f69237..de51e1a3c9 100644
--- a/include/efi.h
+++ b/include/efi.h
@@ -615,6 +615,7 @@ static inline int efi_compare_guid(efi_guid_t *a, efi_guid_t *b)
 }
 
 char *device_path_to_str(struct efi_device_path *dev_path);
+u8 device_path_to_type(struct efi_device_path *dev_path);
 
 const char *efi_guid_string(efi_guid_t *g);