Convert CONFIG_E300 et al to Kconfig

This converts the following to Kconfig:
   CONFIG_E300
   CONFIG_E5500

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/powerpc/cpu/mpc85xx/Kconfig b/arch/powerpc/cpu/mpc85xx/Kconfig
index 6c536b3..c1b4e94 100644
--- a/arch/powerpc/cpu/mpc85xx/Kconfig
+++ b/arch/powerpc/cpu/mpc85xx/Kconfig
@@ -653,6 +653,7 @@
 	bool
 	select BACKSIDE_L2_CACHE
 	select E500MC
+	select E5500
 	select FSL_LAW
 	select SYS_CACHE_SHIFT_6
 	select SYS_FSL_DDR_VER_50
@@ -677,6 +678,7 @@
 	bool
 	select BACKSIDE_L2_CACHE
 	select E500MC
+	select E5500
 	select FSL_LAW
 	select SYS_CACHE_SHIFT_6
 	select SYS_FSL_DDR_VER_50
@@ -701,6 +703,7 @@
 	bool
 	select BACKSIDE_L2_CACHE
 	select E500MC
+	select E5500
 	select FSL_LAW
 	select SYS_CACHE_SHIFT_6
 	select SYS_FSL_DDR_VER_50
@@ -805,6 +808,9 @@
 	help
 		Enble PowerPC E500MC core
 
+config E5500
+	bool
+
 config E6500
 	bool
 	select BTB