src: Retype option API to use unsigned integers

The CMOS option system does not support negative integers. Thus, retype
and rename the option API functions to reflect this.

Change-Id: Id3480e5cfc0ec90674def7ef0919e0b7ac5b19b3
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52672
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
diff --git a/src/southbridge/intel/i82801jx/lpc.c b/src/southbridge/intel/i82801jx/lpc.c
index 55b4746..69990ab 100644
--- a/src/southbridge/intel/i82801jx/lpc.c
+++ b/src/southbridge/intel/i82801jx/lpc.c
@@ -164,7 +164,7 @@
 	 *
 	 * If the option is not existent (Laptops), use MAINBOARD_POWER_ON.
 	 */
-	const int pwr_on = get_int_option("power_on_after_fail", MAINBOARD_POWER_ON);
+	const unsigned int pwr_on = get_uint_option("power_on_after_fail", MAINBOARD_POWER_ON);
 
 	reg8 = pci_read_config8(dev, D31F0_GEN_PMCON_3);
 	reg8 &= 0xfe;
@@ -200,7 +200,7 @@
 	outb(reg8, 0x61);
 
 	reg8 = inb(0x74); /* Read from 0x74 as 0x70 is write only. */
-	const int nmi_option = get_int_option("nmi", NMI_OFF);
+	const unsigned int nmi_option = get_uint_option("nmi", NMI_OFF);
 	if (nmi_option) {
 		printk(BIOS_INFO, "NMI sources enabled.\n");
 		reg8 &= ~(1 << 7);	/* Set NMI. */