fix build for ARMv7E-M + "inline-asm"

Author: japaric

src/register/basepri.rs

@@ -39,7 +39,7 @@ pub unsafe fn write(_basepri: u8) {
             #[cfg(not(feature = "cm7-r0p1"))]
             () => asm!("msr BASEPRI, $0" :: "r"(_basepri) : "memory" : "volatile"),
             #[cfg(feature = "cm7-r0p1")]
-            () => interrupt::free(
+            () => ::interrupt::free(
                 |_| asm!("msr BASEPRI, $0" :: "r"(_basepri) : "memory" : "volatile"),
             ),
         },

src/register/basepri_max.rs

@@ -16,7 +16,7 @@ pub fn write(_basepri: u8) {
                 #[cfg(not(feature = "cm7-r0p1"))]
                 () => asm!("msr BASEPRI_MAX, $0" :: "r"(_basepri) : "memory" : "volatile"),
                 #[cfg(feature = "cm7-r0p1")]
-                () => interrupt::free(
+                () => ::interrupt::free(
                     |_| asm!("msr BASEPRI_MAX, $0" :: "r"(_basepri) : "memory" : "volatile"),
                 ),
             }