disk: part_efi: update partition table entries after write

Fixes fastboot issues when switching from mbr to gpt partition tables.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/disk/part_efi.c b/disk/part_efi.c
index 2f92266..7a24e33 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -867,6 +867,9 @@
 		return 1;
 	}
 
+	/* Update the partition table entries*/
+	part_init(dev_desc);
+
 	return 0;
 }
 #endif