mb/google/brox: use Alderlake-P SoC instead of Alderlake-S

Skolas is actually using the SOC_INTEL_ALDERLAKE_PCH_P config, so
fixing Brox to reflect this as it's using the same SoC.

BUG=b:300690448
BRANCH=None
TEST=emerge-brox coreboot

Change-Id: I632ec055d523956983d2053cd8e7000b1eaabf92
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78656
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brox/Kconfig

@@ -46,7 +46,7 @@ config BOARD_GOOGLE_BASEBOARD_BROX
 	select SOC_INTEL_COMMON_BLOCK_IPU
 	select SOC_INTEL_CRASHLOG
 	select SOC_INTEL_RAPTORLAKE
-	select SOC_INTEL_RAPTORLAKE_PCH_S
+	select SOC_INTEL_ALDERLAKE_PCH_P
 	select SYSTEM_TYPE_LAPTOP
 	select TPM_GOOGLE_CR50