ARM: ux500: Correct Ux500 family names usage

Update users with cpu_is_ux540_family() to keep x540
family functional.

Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/mach-ux500/timer.c b/arch/arm/mach-ux500/timer.c
index 66e7f00..6f39731 100644
--- a/arch/arm/mach-ux500/timer.c
+++ b/arch/arm/mach-ux500/timer.c
@@ -54,7 +54,7 @@
 	void __iomem *tmp_base;
 	struct device_node *np;
 
-	if (cpu_is_u8500_family()) {
+	if (cpu_is_u8500_family() || cpu_is_ux540_family()) {
 		mtu_timer_base = __io_address(U8500_MTU0_BASE);
 		prcmu_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);
 	} else {