Replace last uses of read_option() with get_option()

Change-Id: I63e80953195a6c524392da42b268efe3012ed41b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37953
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/kontron/986lcd-m/early_init.c b/src/mainboard/kontron/986lcd-m/early_init.c
index 0423b2c..80ce896 100644
--- a/src/mainboard/kontron/986lcd-m/early_init.c
+++ b/src/mainboard/kontron/986lcd-m/early_init.c
@@ -29,7 +29,9 @@
 void mainboard_lpc_decode(void)
 {
 	int lpt_en = 0;
-	if (read_option(lpt, 0) != 0)
+	u8 val;
+
+	if (get_option(&val, "lpt") == CB_SUCCESS && val)
 		lpt_en = LPT_LPC_EN; /* enable LPT */
 
 	pci_update_config16(PCI_DEV(0, 0x1f, 0), LPC_EN, ~LPT_LPC_EN, lpt_en);