Fix BootServices and RuntimeServices documentation links.

These links now show that they link to functions in `SystemTable`.

Fix documentation for #416

Author: raccog

src/table/boot.rs

@@ -21,9 +21,9 @@ use core::{ptr, slice};
 ///
 /// # Accessing `BootServices`
 ///
-/// A reference to `BootServices` can only be accessed by calling [`boot_services`].
+/// A reference to `BootServices` can only be accessed by calling [`SystemTable::boot_services`].
 ///
-/// [`boot_services`]: crate::table::SystemTable::boot_services
+/// [`SystemTable::boot_services`]: crate::table::SystemTable::boot_services
 ///
 /// # Accessing protocols
 ///

src/table/runtime.rs

@@ -21,9 +21,9 @@ use core::{fmt, ptr};
 ///
 /// # Accessing `RuntimeServices`
 ///
-/// A reference to `RuntimeServices` can only be accessed by calling [`runtime_services`].
+/// A reference to `RuntimeServices` can only be accessed by calling [`SystemTable::runtime_services`].
 ///
-/// [`runtime_services`]: crate::table::SystemTable::runtime_services
+/// [`SystemTable::runtime_services`]: crate::table::SystemTable::runtime_services
 #[repr(C)]
 pub struct RuntimeServices {
     header: Header,