MPC8610HPCD: Drop -O2 from the build flags

Make the flags use -Os like all other boards

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/freescale/mpc8610hpcd/config.mk b/board/freescale/mpc8610hpcd/config.mk
index 64ac4dc..99e7bd4 100644
--- a/board/freescale/mpc8610hpcd/config.mk
+++ b/board/freescale/mpc8610hpcd/config.mk
@@ -22,4 +22,4 @@
 TEXT_BASE = 0xfff00000
 
 PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx=1
-PLATFORM_CPPFLAGS += -DCONFIG_MPC8610=1 -maltivec -mabi=altivec -msoft-float -O2
+PLATFORM_CPPFLAGS += -DCONFIG_MPC8610=1 -maltivec -mabi=altivec -msoft-float