Convert CONFIG_DMA_LPC32XX to Kconfig

This converts the following to Kconfig:
   CONFIG_DMA_LPC32XX

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/devkit3250_defconfig b/configs/devkit3250_defconfig
index 2d4d665..9c886a1 100644
--- a/configs/devkit3250_defconfig
+++ b/configs/devkit3250_defconfig
@@ -42,6 +42,7 @@
 CONFIG_VERSION_VARIABLE=y
 CONFIG_SYS_I2C_LEGACY=y
 CONFIG_SPL_SYS_I2C_LEGACY=y
+CONFIG_DMA_LPC32XX=y
 CONFIG_SYS_I2C_LPC32XX=y
 # CONFIG_MMC is not set
 CONFIG_MTD=y
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index e81ae96..ff5b834 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -35,6 +35,16 @@
 	  This driver support data transfer from devices to
 	  memory and from memory to devices.
 
+config DMA_LPC32XX
+	bool "LPC32XX DMA driver"
+	select DMA_LEGACY
+	help
+	  Enable some legacy DMA code for lpc32xx. It provides some direct
+	  functions likes lpc32xx_dma_wait_status() which can be called from
+	  other code.
+
+	  This should be converted to use driver model and UCLASS_DMA.
+
 config TI_EDMA3
 	bool "TI EDMA3 driver"
 	select DMA_LEGACY
@@ -49,6 +59,7 @@
 	help
 	  Enable APBH DMA driver.
 
+
 if APBH_DMA
 config APBH_DMA_BURST
 	bool "Enable DMA BURST"
diff --git a/include/configs/devkit3250.h b/include/configs/devkit3250.h
index 4ef61e9..f32e18b 100644
--- a/include/configs/devkit3250.h
+++ b/include/configs/devkit3250.h
@@ -26,9 +26,6 @@
 /*
  * DMA
  */
-#if !defined(CONFIG_SPL_BUILD)
-#define CONFIG_DMA_LPC32XX
-#endif
 
 /*
  * GPIO
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 9f8fd15..0dbcc16 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -223,7 +223,6 @@
 CONFIG_DM9000_USE_16BIT
 CONFIG_DMA_COHERENT
 CONFIG_DMA_COHERENT_SIZE
-CONFIG_DMA_LPC32XX
 CONFIG_DMA_NONCOHERENT
 CONFIG_DNET_AUTONEG_TIMEOUT
 CONFIG_DP_DDR_CTRL