fsl_ddr: Move DDR config options to driver Kconfig

Create driver/ddr/fsl/Kconfig and move existing options. Clean up
existing macros.

Signed-off-by: York Sun <york.sun@nxp.com>
[trini: Migrate sbc8641d, xpedite537x and MPC8536DS, run a moveconfig.py -s]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/powerpc/cpu/mpc83xx/Kconfig b/arch/powerpc/cpu/mpc83xx/Kconfig
index 3ea62ca..6e4a931 100644
--- a/arch/powerpc/cpu/mpc83xx/Kconfig
+++ b/arch/powerpc/cpu/mpc83xx/Kconfig
@@ -38,6 +38,9 @@
 
 config TARGET_MPC8349EMDS
 	bool "Support MPC8349EMDS"
+	select SYS_FSL_DDR
+	select SYS_FSL_HAS_DDR2
+	select SYS_FSL_DDR_BE
 
 config TARGET_MPC8349ITX
 	bool "Support MPC8349ITX"