soc/intel/xeon_sp: Fix CBMEM corruption

On the 4 socket IBM/SBP1 platform with 384 cores lots
of space for ACPI tables is required.
Bump MAX_ACPI_TABLE_SIZE_KB to 400 to fix CBMEM corruption.

Change-Id: Ifbd79e84097231b41f900425a2e8750dce71a25a
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73364
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Naresh Solanki <naresh.solanki.2011@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/xeon_sp/spr/Kconfig

@@ -149,6 +149,7 @@ config DIMM_SPD_SIZE
 
 config MAX_ACPI_TABLE_SIZE_KB
 	int
+	default 400 if MAX_SOCKET = 4
 	default 224
 
 config FIXED_SMBUS_IO_BASE