acs: add GIC eSPI TF-A build option

Hafnium requires GIC extended SPI support.
Add the TF-A build option for supporting GIC eSPI.

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: Id3efdeb14778f8e7682e221067a06b2a9b17c8d0
1 file changed
tree: 479621e89baa01236ecb9e25789613665cb03a16
  1. acs/