soc/intel/alderlake/Kconfig: Set correct P2SB BAR for ADL PCH-S

According to Intel DOC #630603 P2SB BAR must be at 0xe0000000 for
PCH-S.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Ie6db3f7108ff1edf62c94876412adfc6421034d8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63460
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig
index b631624..35fd2f7 100644
--- a/src/soc/intel/alderlake/Kconfig
+++ b/src/soc/intel/alderlake/Kconfig
@@ -251,6 +251,7 @@
 
 config PCR_BASE_ADDRESS
 	hex
+	default 0xe0000000 if SOC_INTEL_ALDERLAKE_PCH_S
 	default 0xfd000000
 	help
 	  This option allows you to select MMIO Base Address of sideband bus.