mb/google/skyrim: Update Kconfig to point to SPL

ChromeOS requires a custom SPL table.  Update Kconfig to point to the
ChromeOS version of the SPL resident in the blobs directory.

Bug=b:245727030
Test=Boots

Signed-off-by: Jon Murphy <jpmurphy@google.com>
Change-Id: I70dcb19983c970283ee887b78a18c0668e83d4b0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67928
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/skyrim/Kconfig b/src/mainboard/google/skyrim/Kconfig
index cf2e136..72079e8 100644
--- a/src/mainboard/google/skyrim/Kconfig
+++ b/src/mainboard/google/skyrim/Kconfig
@@ -55,6 +55,15 @@
 	hex
 	default 0x50
 
+config HAVE_SPL_FILE
+	bool
+	default y
+
+config SPL_TABLE_FILE
+	string
+	depends on HAVE_SPL_FILE
+	default "3rdparty/blobs/mainboard/google/skyrim/TypeId0x55_SplTableBl_MDN_CHROME.sbin"
+
 config FMDFILE
 	default "src/mainboard/\$(CONFIG_MAINBOARD_DIR)/chromeos.fmd"