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
1 file changed