i386: Use ENTRY/END in assembly codes

Use ENTRY and END in assembly codes so that ENDBR32 will be added at
function entries when CET is enabled.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

sysdeps/i386/nptl/pthread_spin_lock.S

@@ -15,12 +15,10 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <sysdep.h>
 #include <lowlevellock.h>
 
-	.globl	pthread_spin_lock
-	.type	pthread_spin_lock,@function
-	.align	16
-pthread_spin_lock:
+ENTRY (pthread_spin_lock)
 	mov	4(%esp), %eax
 1:	LOCK
 	decl	0(%eax)
@@ -34,4 +32,4 @@ pthread_spin_lock:
 	cmpl	$0, 0(%eax)
 	jg	1b
 	jmp	2b
-	.size	pthread_spin_lock,.-pthread_spin_lock
+END (pthread_spin_lock)

sysdeps/i386/nptl/pthread_spin_unlock.S

@@ -16,15 +16,14 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-	.globl	pthread_spin_unlock
-	.type	pthread_spin_unlock,@function
-	.align	16
-pthread_spin_unlock:
+#include <sysdep.h>
+
+ENTRY (pthread_spin_unlock)
 	movl	4(%esp), %eax
 	movl	$1, (%eax)
 	xorl	%eax, %eax
 	ret
-	.size	pthread_spin_unlock,.-pthread_spin_unlock
+END (pthread_spin_unlock)
 
 	/* The implementation of pthread_spin_init is identical.  */
 	.globl	pthread_spin_init

sysdeps/i386/pthread_spin_trylock.S

@@ -16,6 +16,7 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <sysdep.h>
 #include <pthread-errnos.h>
 
 
@@ -25,10 +26,7 @@
 # define LOCK lock
 #endif
 
-	.globl	pthread_spin_trylock
-	.type	pthread_spin_trylock,@function
-	.align	16
-pthread_spin_trylock:
+ENTRY (pthread_spin_trylock)
 	movl	4(%esp), %edx
 	movl	$1, %eax
 	xorl	%ecx, %ecx
@@ -43,4 +41,4 @@ pthread_spin_trylock:
 0:
 #endif
 	ret
-	.size	pthread_spin_trylock,.-pthread_spin_trylock
+END (pthread_spin_trylock)