keymile: Make distinct kmeter1, and kmcoge5ne configs

The kmeter1, and kmcoge5ne boards also build from the same config
file with #ifdef logic.

Create a separate include config for each board with the #ifdef logic
resolved as needed.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/arch/powerpc/cpu/mpc83xx/Kconfig b/arch/powerpc/cpu/mpc83xx/Kconfig
index 1ebb092..29d84f3 100644
--- a/arch/powerpc/cpu/mpc83xx/Kconfig
+++ b/arch/powerpc/cpu/mpc83xx/Kconfig
@@ -80,8 +80,15 @@
 	select DM
 	imply CMD_DM
 
-config TARGET_KM8360
-	bool "Support km8360"
+config TARGET_KMETER1
+	bool "Support kmeter1"
+	select ARCH_MPC8360
+	imply CMD_CRAMFS
+	imply CMD_DIAG
+	imply FS_CRAMFS
+
+config TARGET_KMCOGE5NE
+	bool "Support kmcoge5ne"
 	select ARCH_MPC8360
 	imply CMD_CRAMFS
 	imply CMD_DIAG