[POWERPC] Select u-image as default image for Linkstation

Fixes image build error:

ln: accessing `arch/powerpc/boot/zImage': No such file or directory
make[1]: *** [arch/powerpc/boot/zImage] Error 1
make: *** [zImage] Error 2

Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
Acked-by: G. Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

authored by Segher Boessenkool and committed by Kumar Gala 49fdf3f0 aea12b75

+1
+1
arch/powerpc/platforms/embedded6xx/Kconfig
··· 79 79 select MPIC 80 80 select FSL_SOC 81 81 select PPC_UDBG_16550 if SERIAL_8250 82 + select DEFAULT_UIMAGE 82 83 help 83 84 Select LINKSTATION if configuring for one of PPC- (MPC8241) 84 85 based NAS systems from Buffalo Technology. So far only