StandaloneMmPkg: Populate Hoblist for SP init from StMM boot information

This patch adds support for creating a hoblist from the reduced boot
information retrieved from the SP manifest.

Signed-off-by: Achin Gupta <achin.gupta@arm.com>
Signed-off-by: Nishant Sharma <nishant.sharma@arm.com>
Change-Id: I0780483428bea636937e89ba9a348fa95f2e4c89