soc/intel/alderlake: Add Kconfigs for all PCH types

The Alder Lake code currently supports the PCH-M and PCH-P types, which
have some differences (so far, only the amount of PCIe I/O). Mainboards
can use the `SOC_INTEL_ALDERLAKE_PCH_M` Kconfig option to specify which
PCH type they use: select the option to choose PCH-M, do not select the
option to choose PCH-P. While this works, it can be confusing once more
PCH types are added.

Introduce the `SOC_INTEL_ALDERLAKE_PCH_P` Kconfig option so that boards
have to explicitly choose a PCH type. Also, use this option to restrict
the PCH-P defaults for PCH-dependent settings to avoid unintended reuse
of the PCH-P defaults when adding a new PCH type. To make sure only one
PCH type is selected, add some preprocessor in `bootblock.h` to provoke
a build-time error if this requirement is not met. Kconfig doesn't seem
to have a mechanism to describe sets of mutually-exclusive bool options
that allows said options to be selected (a `choice` block doesn't allow
its elements to be selected). Finally, adapt the ADL boards accordingly.

Change-Id: I7deca820e08ce2b5a220f3c97a511a4f3464a976
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59804
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index a5ca94209d..4b25af53aa 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -45,7 +45,7 @@ config BOARD_GOOGLE_BRYA_COMMON
 	select MAINBOARD_HAS_CHROMEOS
 	select MAINBOARD_HAS_I2C_TPM_CR50
 	select MAINBOARD_HAS_TPM2
-	select SOC_INTEL_ALDERLAKE
+	select SOC_INTEL_ALDERLAKE_PCH_P
 	select SOC_INTEL_COMMON_BLOCK_PCIE_RTD3
 	select SOC_INTEL_CSE_LITE_SKU
 	select INTEL_CAR_NEM #TODO - Enable INTEL_CAR_NEM_ENHANCED