[CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2

Remove __attribute__((weak)) from common code sys_pipe implemantation.
IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations
with the same name. Just rename them.
For sys_pipe2 there is no architecture specific implementation.

Cc: Richard Henderson <rth@twiddle.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

arch/alpha/kernel/entry.S

@@ -896,9 +896,9 @@ sys_getxpid:
 .end sys_getxpid
 
 	.align	4
-	.globl	sys_pipe
-	.ent	sys_pipe
-sys_pipe:
+	.globl	sys_alpha_pipe
+	.ent	sys_alpha_pipe
+sys_alpha_pipe:
 	lda	$sp, -16($sp)
 	stq	$26, 0($sp)
 	.prologue 0
@@ -916,7 +916,7 @@ sys_pipe:
 	stq	$1, 80+16($sp)
 1:	lda	$sp, 16($sp)
 	ret
-.end sys_pipe
+.end sys_alpha_pipe
 
 	.align	4
 	.globl	sys_execve