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/ec/lenovo/h8/wwan.c b/src/ec/lenovo/h8/wwan.c
index 90f6b47..685886f 100644
--- a/src/ec/lenovo/h8/wwan.c
+++ b/src/ec/lenovo/h8/wwan.c
@@ -46,5 +46,5 @@
  */
 bool h8_wwan_nv_enable(void)
 {
-	return get_int_option("wwan", true);
+	return get_uint_option("wwan", true);
 }