clk: rockchip: don't return NULL when failing to register ddrclk branch

rockchip_clk_register_ddrclk should not return NULL when failing
to call clk_register, otherwise rockchip_clk_register_branches
prints "unknown clock type". The actual case is that it's a known
clock type but we fail to register it, which may makes user confuse
the reason of failure. And the pr_err here is pointless as
rockchip_clk_register_branches will also print the similar message.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

path: root/astraceroute/Makefile

astraceroute-libs =	-lpthread

ifeq ($(CONFIG_GEOIP), 1)
astraceroute-libs +=	-lGeoIP \
			-lz
endif


astraceroute-objs =	xmalloc.o \
			proto_none.o \
			tprintf.o \
			bpf.o \
			str.o \
			sig.o \
			sock.o \
			link.o \
			dev.o \
			ring.o \
			die.o \
			sysctl.o \
			astraceroute.o

ifeq ($(CONFIG_GEOIP), 1)
astraceroute-objs +=	geoip.o \
			ioops.o
endif

astraceroute-eflags =

astraceroute-confs =	geoip.conf