[PATCH] ppc64: fix compile warning

Fix a compile warning introduced by the previous patches.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/iSeries_setup.c

@@ -888,7 +888,6 @@ static int iseries_shared_idle(void)
 
 static int iseries_dedicated_idle(void)
 {
-	struct paca_struct *lpaca = get_paca();
 	long oldval;
 
 	while (1) {