Build arch/$ARCH/lib/bootm.o depending on CONFIG_CMD_BOOTM

MAKEALL is fine for ppc4xx and mpc85xx.
Run checks were done on our controlcenterd hardware.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Andy Fleming <afleming@freescale.com>

arch/sh/lib/Makefile

@@ -33,7 +33,7 @@ GLSOBJS	+= lshrdi3.o
 GLSOBJS	+= movmem.o
 
 COBJS-y	+= board.o
-COBJS-y	+= bootm.o
+COBJS-$(CONFIG_CMD_BOOTM) += bootm.o
 ifeq ($(CONFIG_SH2),y)
 COBJS-y	+= time_sh2.o
 else