86xx: Remove redudant PLATFORM_CPPFLAGS

For historic reasons we had defined some additional PLATFORM_CPPFLAGS like:

PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx=1
PLATFORM_CPPFLAGS += -DCONFIG_MPC8641=1

However these are all captured in the config.h and thus redudant.  Also
moved common 86xx flags into cpu/mpc86xx/config.mk.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

board/freescale/mpc8610hpcd/config.mk

@@ -20,6 +20,3 @@
 #
 
 TEXT_BASE = 0xfff00000
-
-PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx=1
-PLATFORM_CPPFLAGS += -DCONFIG_MPC8610=1 -maltivec -mabi=altivec -msoft-float

board/freescale/mpc8641hpcn/config.mk

@@ -26,6 +26,3 @@
 # assume U-Boot is less than 0.5MB
 #
 TEXT_BASE = 0xeff00000
-
-PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx=1
-PLATFORM_CPPFLAGS += -DCONFIG_MPC8641=1 -maltivec -mabi=altivec -msoft-float

board/sbc8641d/config.mk

@@ -25,6 +25,3 @@
 # default CCSRBAR is at 0xff700000
 #
 TEXT_BASE = 0xfff00000
-
-PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx=1
-PLATFORM_CPPFLAGS += -DCONFIG_MPC8641=1 -maltivec -mabi=altivec -msoft-float

board/xes/xpedite5170/config.mk

@@ -27,6 +27,3 @@
 TEXT_BASE = 0xfff00000
 
 PLATFORM_RELFLAGS += -mrelocatable
-
-PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx=1
-PLATFORM_CPPFLAGS += -DCONFIG_MPC8641=1 -maltivec -mabi=altivec -msoft-float

cpu/mpc86xx/config.mk

@@ -23,4 +23,5 @@
 
 PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
 
-PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx -ffixed-r2 -mstring
+PLATFORM_CPPFLAGS += -ffixed-r2 -mstring
+PLATFORM_CPPFLAGS += -maltivec -mabi=altivec -msoft-float