bionic: Rename _ARM_HAVE_LDREX_STREX to __ARM_HAVE_LDREX_STREX for consistency
The patch follows the naming manner in existing macros with prefix
__ARM_HAVE.
Change-Id: I6763ce2bf3ee85fd1da112c719543061d8d19bf4
diff --git a/libc/arch-arm/bionic/atomics_arm.S b/libc/arch-arm/bionic/atomics_arm.S
index 047541f..f2e369d 100644
--- a/libc/arch-arm/bionic/atomics_arm.S
+++ b/libc/arch-arm/bionic/atomics_arm.S
@@ -142,7 +142,7 @@
/* r0(new) r1(addr) -> r0(old) */
/* replaced swp instruction with ldrex/strex for ARMv6 & ARMv7 */
__atomic_swap:
-#if defined (_ARM_HAVE_LDREX_STREX)
+#if defined (__ARM_HAVE_LDREX_STREX)
1: ldrex r2, [r1]
strex r3, r0, [r1]
teq r3, #0