Qualify the source argument of atomic loads as a const pointer.

Also normalizes the opening brace placment in a few locations.

Change-Id: I8f518e933094337d5d3371321326ffc03b3a5f5a
diff --git a/include/cutils/atomic-arm.h b/include/cutils/atomic-arm.h
index 0dd629d..93633c4 100644
--- a/include/cutils/atomic-arm.h
+++ b/include/cutils/atomic-arm.h
@@ -49,14 +49,14 @@
 }
 #endif
 
-extern inline int32_t android_atomic_acquire_load(volatile int32_t *ptr)
+extern inline int32_t android_atomic_acquire_load(volatile const int32_t *ptr)
 {
     int32_t value = *ptr;
     android_memory_barrier();
     return value;
 }
 
-extern inline int32_t android_atomic_release_load(volatile int32_t *ptr)
+extern inline int32_t android_atomic_release_load(volatile const int32_t *ptr)
 {
     android_memory_barrier();
     return *ptr;
@@ -196,11 +196,13 @@
 }
 #endif
 
-extern inline int32_t android_atomic_inc(volatile int32_t *addr) {
+extern inline int32_t android_atomic_inc(volatile int32_t *addr)
+{
     return android_atomic_add(1, addr);
 }
 
-extern inline int32_t android_atomic_dec(volatile int32_t *addr) {
+extern inline int32_t android_atomic_dec(volatile int32_t *addr)
+{
     return android_atomic_add(-1, addr);
 }