Convert CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS
   CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS

And we remove the entries from the README for a number of already
converted items.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/ddr/fsl/Kconfig b/drivers/ddr/fsl/Kconfig
index 22400a9..7f8f357 100644
--- a/drivers/ddr/fsl/Kconfig
+++ b/drivers/ddr/fsl/Kconfig
@@ -40,6 +40,9 @@
 config FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
 	bool
 
+config SYS_FSL_OTHER_DDR_NUM_CTRLS
+	bool
+
 menu "Freescale DDR controllers"
 	depends on SYS_FSL_DDR
 
@@ -63,6 +66,10 @@
 	int "Number of DIMM slots per controller"
 	default 1
 
+config SYS_FSL_DDR_MAIN_NUM_CTRLS
+	int "Number of controllers used as main memory"
+	default SYS_NUM_DDR_CTLRS
+
 config SYS_FSL_DDR_VER
 	int
 	default 50 if SYS_FSL_DDR_VER_50