Add http/https boot option

Add a new boot option http/https since some platforms support such option.

Tested:
Build okay;
IPMI get/set boot option commands will use it.

Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
Change-Id: I2185ac0b471c71ccdd147c1a16865ddda88a89c1
diff --git a/xyz/openbmc_project/Control/Boot/Source.interface.yaml b/xyz/openbmc_project/Control/Boot/Source.interface.yaml
index 4e0211e..facf5d7 100644
--- a/xyz/openbmc_project/Control/Boot/Source.interface.yaml
+++ b/xyz/openbmc_project/Control/Boot/Source.interface.yaml
@@ -27,3 +27,6 @@
         - name: RemovableMedia
           description: >
             Boot from floppy/primary removable media (USB).
+        - name: HTTP
+          description: >
+            Boot from a remote source over http/https.