Install perf on all HW targets

Experience shows that I indeed do quite some profiling.

Change-Id: I632799a4032f3777b0321c695b5d5330a9c5391d
diff --git a/configs/czechlight_clearfog_defconfig b/configs/czechlight_clearfog_defconfig
index b19ab3c..1f3ac8f 100644
--- a/configs/czechlight_clearfog_defconfig
+++ b/configs/czechlight_clearfog_defconfig
@@ -24,6 +24,7 @@
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="armada-388-clearfog-base"
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
+BR2_PACKAGE_LINUX_TOOLS_PERF=y
 BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/common/busybox-config"
 BR2_PACKAGE_UBOOT_TOOLS=y
 BR2_TARGET_ROOTFS_EXT2=y