powerpc/math-emu: Fix efp dependence

There is no dependece between efp and math-emu.  But when disable math-emu
the efp code cannot be built.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/Makefile

@@ -147,8 +147,8 @@ core-y				+= arch/powerpc/kernel/ \
 				   arch/powerpc/mm/ \
 				   arch/powerpc/lib/ \
 				   arch/powerpc/sysdev/ \
-				   arch/powerpc/platforms/
-core-$(CONFIG_MATH_EMULATION)	+= arch/powerpc/math-emu/
+				   arch/powerpc/platforms/ \
+				   arch/powerpc/math-emu/
 core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
 core-$(CONFIG_KVM) 		+= arch/powerpc/kvm/
 

arch/powerpc/math-emu/Makefile

 
-obj-y				:= math.o fmr.o lfd.o stfd.o
-
 obj-$(CONFIG_MATH_EMULATION)	+= fabs.o fadd.o fadds.o fcmpo.o fcmpu.o \
 					fctiw.o fctiwz.o fdiv.o fdivs.o \
 					fmadd.o fmadds.o fmsub.o fmsubs.o \
@@ -9,7 +7,8 @@ obj-$(CONFIG_MATH_EMULATION)	+= fabs.o fadd.o fadds.o fcmpo.o fcmpu.o \
 					fres.o frsp.o frsqrte.o fsel.o lfs.o \
 					fsqrt.o	fsqrts.o fsub.o fsubs.o \
 					mcrfs.o mffs.o mtfsb0.o mtfsb1.o \
-					mtfsf.o mtfsfi.o stfiwx.o stfs.o
+					mtfsf.o mtfsfi.o stfiwx.o stfs.o \
+					math.o fmr.o lfd.o stfd.o
 
 obj-$(CONFIG_SPE)		+= math_efp.o