fw_config: Make fw_config_get() public

Further patches will make use of this raw 64-bit value.

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I161893c09da6a44265299f6ae3c3a81249a96084
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46604
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/fw_config.h

@@ -32,6 +32,13 @@ struct fw_config {
 
 #if CONFIG(FW_CONFIG)
 
+/**
+ * fw_config_get() - Provide firmware configuration value.
+ *
+ * Return 64bit firmware configuration value determined for the system.
+ */
+uint64_t fw_config_get(void);
+
 /**
  * fw_config_probe() - Check if field and option matches.
  * @match: Structure containing field and option to probe.