trace: remove newline from grlib_irqmp_check_irqs format string

There is no need to put a newline in trace event format strings.  The
backend may use the format string within some context and takes care of
how to display the event.  The stderr backend automatically appends "\n"
whereas the ust backend does not want a newline at all.
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

trace-events

@@ -327,7 +327,7 @@ grlib_gptimer_readl(int id, uint64_t addr, uint32_t val) "timer:%d addr 0x%"PRIx
 grlib_gptimer_writel(int id, uint64_t addr, uint32_t val) "timer:%d addr 0x%"PRIx64" 0x%x"
 
 # hw/grlib_irqmp.c
-grlib_irqmp_check_irqs(uint32_t pend, uint32_t force, uint32_t mask, uint32_t lvl1, uint32_t lvl2) "pend:0x%04x force:0x%04x mask:0x%04x lvl1:0x%04x lvl0:0x%04x\n"
+grlib_irqmp_check_irqs(uint32_t pend, uint32_t force, uint32_t mask, uint32_t lvl1, uint32_t lvl2) "pend:0x%04x force:0x%04x mask:0x%04x lvl1:0x%04x lvl0:0x%04x"
 grlib_irqmp_ack(int intno) "interrupt:%d"
 grlib_irqmp_set_irq(int irq) "Raise CPU IRQ %d"
 grlib_irqmp_readl_unknown(uint64_t addr) "addr 0x%"PRIx64""