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/mainboard/dell/optiplex_9010/sch5545_ec.c b/src/mainboard/dell/optiplex_9010/sch5545_ec.c
index 9e25f18..60cde7d 100644
--- a/src/mainboard/dell/optiplex_9010/sch5545_ec.c
+++ b/src/mainboard/dell/optiplex_9010/sch5545_ec.c
@@ -656,7 +656,7 @@
 
 	ec_read_write_reg(EC_HWM_LDN, 0x02fc, &val_2fc, WRITE_OP);
 
-	unsigned int fan_speed_full = get_int_option("fan_full_speed", 0);
+	unsigned int fan_speed_full = get_uint_option("fan_full_speed", 0);
 	if (fan_speed_full) {
 		printk(BIOS_INFO, "Will set up fans to run at full speed\n");
 		ec_read_write_reg(EC_HWM_LDN, 0x0080, &val, READ_OP);