make this function const

Author: robamu

cortex-ar/src/mmu.rs

@@ -284,7 +284,7 @@ impl L1Section {
 
     /// Set the section attributes without changing the address.
     #[inline]
-    pub fn set_section_attrs(&mut self, section_attrs: SectionAttributes) {
-        self.raw_value = self.base_addr().as_u32() | section_attrs.l1_section_part().raw_value();
+    pub const fn set_section_attrs(&mut self, section_attrs: SectionAttributes) {
+        self.raw_value = self.base_addr().value() as u32 | section_attrs.l1_section_part().raw_value();
     }
 }