This allows us to build libspdm with support for `spdm-context` in the HAL functions. This is required by `spdm-utils`, this macro will be dissolved in libspdm 4.x, with this feature being defaulted on. Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com> [Julien: rebased on libspdm 3.5.0 recipe] Signed-off-by: Julien Olivain <ju.o@free.fr>