global: Refactor get_option usage

Restructure get_option() calls to avoid unnecessary return value checks
by pre-assigning defaults to the options being retrieved.

Change-Id: I9159afe149a8eeed0785d1efd6eee8420b88b8f4
Signed-off-by: Varad Gautam <varadgautam@gmail.com>
Reviewed-on: http://review.coreboot.org/8631
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
diff --git a/src/southbridge/intel/i82801ix/lpc.c b/src/southbridge/intel/i82801ix/lpc.c
index 0ba33d6..4f576c4 100644
--- a/src/southbridge/intel/i82801ix/lpc.c
+++ b/src/southbridge/intel/i82801ix/lpc.c
@@ -186,8 +186,8 @@
 	 *
 	 * If the option is not existent (Laptops), use MAINBOARD_POWER_ON.
 	 */
-	if (get_option(&pwr_on, "power_on_after_fail") != CB_SUCCESS)
-		pwr_on = MAINBOARD_POWER_ON;
+	pwr_on = MAINBOARD_POWER_ON;
+	get_option(&pwr_on, "power_on_after_fail");
 
 	reg8 = pci_read_config8(dev, D31F0_GEN_PMCON_3);
 	reg8 &= 0xfe;