accel/amdxdna: Add AIE4 firmware loading

accel/amdxdna: Add AIE4 firmware loading

Add support for loading AIE4 firmware through the common PSP
interfaces.

Compared to AIE2, AIE4 introduces an additional CERT firmware image.
aiem_psp_create() performs CERT setup when the CERT image size is
non-zero.

Co-developed-by: Hayden Laccabue <Hayden.Laccabue@amd.com>
Signed-off-by: Hayden Laccabue <Hayden.Laccabue@amd.com>
Signed-off-by: David Zhang <yidong.zhang@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260330163705.3153647-5-lizhi.hou@amd.com