mb/prodrive/atlas: Enable legacy S3 support

Enable S3 support as Prodrive doesn't need s0ix for now.

Signed-off-by: Lean Sheng Tan <sheng.tan@9elements.com>
Change-Id: I7625c8ac860e1afc60c94b3c51e996531a1f2b15
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67414
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

src/mainboard/prodrive/atlas/Kconfig

@@ -12,6 +12,7 @@ config BOARD_PRODRIVE_ATLAS_BASEBOARD
 	select MEMORY_MAPPED_TPM
 	select PCIEXP_SUPPORT_RESIZABLE_BARS
 	select SOC_INTEL_ALDERLAKE_PCH_P
+	select SOC_INTEL_ALDERLAKE_S3
 
 if BOARD_PRODRIVE_ATLAS_BASEBOARD