csky: entry: Remove unneeded need_resched() loop

Since the enabling and disabling of IRQs within preempt_schedule_irq()
is contained in a need_resched() loop, we don't need the outer arch
code loop.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S
index 564dab2..a7a5b67 100644
--- a/arch/csky/kernel/entry.S
+++ b/arch/csky/kernel/entry.S
@@ -302,11 +302,7 @@
 	ldw	r12, (r9, TINFO_FLAGS)
 	btsti	r12, TIF_NEED_RESCHED
 	bf	2f
 	jbsr	preempt_schedule_irq	/* irq en/disable is done inside */
-	ldw	r7, (r9, TINFO_FLAGS)	/* get new tasks TI_FLAGS */
-	btsti	r7, TIF_NEED_RESCHED
-	bt	1b			/* go again */
 	jmpi	ret_from_exception