ARM: ux500: add PERF_EVENTS to defconfig

The Ux500 has a perfectly working PMU so let's put the perf
events into the defconfig. This will activate HW_PERF_EVENTS
by default.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/u8500_defconfig

@@ -4,6 +4,7 @@ CONFIG_NO_HZ_IDLE=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
+CONFIG_PERF_EVENTS=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 # CONFIG_BLK_DEV_BSG is not set