arch/x86/include/bert_storage: introduce bert_should_generate_acpi_table

Since bert_errors_present() is only available when ACPI_BERT is selected
the ACPI table generation code needs to check that before calling the
function, so add bert_should_generate_acpi_table that returns false when
ACPI_BERT isn't selected or the return value of bert_errors_present()
when ACPI_BERT is selected.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ia955f627c190ea38e05b5aaedc7cb2d030274e83
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55024
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/x86/include/arch/bert_storage.h

@@ -56,6 +56,11 @@ void bert_errors_region(void **start, size_t *size);
 size_t bert_storage_remaining(void);
 /* Find if errors were added, a BERT region is present, and ACPI table needed */
 bool bert_errors_present(void);
+/* The BERT table should only be generated when BERT support is enabled and there's an error */
+static inline bool bert_should_generate_acpi_table(void)
+{
+	return CONFIG(ACPI_BERT) && bert_errors_present();
+}
 
 /* Get the number of entries associated with status */
 static inline size_t bert_entry_count(acpi_generic_error_status_t *status)