disk: part_efi: add new partition attribute definitions

Add no_block_io_protocol and legacy_bios_bootable attribute definitions.
These are sourced from UEFI Spec 2.3, page 105, table 19. Credits to the
libparted source for the specification pointer.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

disk/part_efi.h

@@ -113,7 +113,9 @@ typedef struct _gpt_header {
 
 typedef struct _gpt_entry_attributes {
 	unsigned long long required_to_function:1;
-	unsigned long long reserved:47;
+	unsigned long long no_block_io_protocol:1;
+	unsigned long long legacy_bios_bootable:1;
+	unsigned long long reserved:45;
 	unsigned long long type_guid_specific:16;
 } __attribute__ ((packed)) gpt_entry_attributes;