[POWERPC] rheap: Changes config mechanism

Instead of having in the makefile all the option that
requires rheap, we define a configuration symbol
and when needed we make sure it's selected.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 65d492e..4bb023f 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -14,7 +14,6 @@
 
 obj-$(CONFIG_PPC64)	+= copypage_64.o copyuser_64.o \
 			   memcpy_64.o usercopy_64.o mem_64.o string.o
-obj-$(CONFIG_QUICC_ENGINE) += rheap.o
 obj-$(CONFIG_XMON)	+= sstep.o
 obj-$(CONFIG_KPROBES)	+= sstep.o
 obj-$(CONFIG_NOT_COHERENT_CACHE)	+= dma-noncoherent.o
@@ -23,6 +22,4 @@
 obj-$(CONFIG_SMP)	+= locks.o
 endif
 
-# Temporary hack until we have migrated to asm-powerpc
-obj-$(CONFIG_8xx)	+= rheap.o
-obj-$(CONFIG_CPM2)	+= rheap.o
+obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o