imx: mx6slevk: enable DM_SPI and DM_SPI_FLASH

With DM_SPI and DM_SPI_FLASH enabled, we could get:

spi          0  [   ]   mxc_spi               |   |   |   `-- ecspi@02008000
spi_flash    0  [   ]   spi_flash_std         |   |   |       `-- m25p80@0

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
index 4c48679..33ae91c 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -15,7 +15,6 @@
 #include <asm/gpio.h>
 #include <asm/mach-imx/iomux-v3.h>
 #include <asm/mach-imx/mxc_i2c.h>
-#include <asm/mach-imx/spi.h>
 #include <asm/io.h>
 #include <linux/sizes.h>
 #include <common.h>
@@ -41,9 +40,6 @@
 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |             \
 	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
 
-#define SPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_SPEED_MED | \
-		      PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
-
 #define OTGID_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
 			PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW |\
 			PAD_CTL_DSE_80ohm | PAD_CTL_HYS |	\
@@ -120,25 +116,6 @@
 	MX6_PAD_FEC_TX_CLK__GPIO_4_21 | MUX_PAD_CTRL(NO_PAD_CTRL),
 };
 
-#ifdef CONFIG_MXC_SPI
-static iomux_v3_cfg_t ecspi1_pads[] = {
-	MX6_PAD_ECSPI1_MISO__ECSPI_MISO | MUX_PAD_CTRL(SPI_PAD_CTRL),
-	MX6_PAD_ECSPI1_MOSI__ECSPI_MOSI | MUX_PAD_CTRL(SPI_PAD_CTRL),
-	MX6_PAD_ECSPI1_SCLK__ECSPI_SCLK | MUX_PAD_CTRL(SPI_PAD_CTRL),
-	MX6_PAD_ECSPI1_SS0__GPIO4_IO11  | MUX_PAD_CTRL(NO_PAD_CTRL),
-};
-
-int board_spi_cs_gpio(unsigned bus, unsigned cs)
-{
-	return (bus == 0 && cs == 0) ? (IMX_GPIO_NR(4, 11)) : -1;
-}
-
-static void setup_spi(void)
-{
-	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
-}
-#endif
-
 static void setup_iomux_uart(void)
 {
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
@@ -232,11 +209,6 @@
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
-#ifdef CONFIG_MXC_SPI
-	gpio_request(IMX_GPIO_NR(4, 11), "spi_cs");
-	setup_spi();
-#endif
-
 #ifdef	CONFIG_FEC_MXC
 	setup_fec();
 #endif
diff --git a/configs/mx6slevk_defconfig b/configs/mx6slevk_defconfig
index e614ef2..6a7fa13 100644
--- a/configs/mx6slevk_defconfig
+++ b/configs/mx6slevk_defconfig
@@ -35,6 +35,7 @@
 CONFIG_DM_I2C=y
 CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000
@@ -50,6 +51,7 @@
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_DM_THERMAL=y
 CONFIG_USB=y
diff --git a/configs/mx6slevk_spinor_defconfig b/configs/mx6slevk_spinor_defconfig
index 6ade0ef..b4812ff 100644
--- a/configs/mx6slevk_spinor_defconfig
+++ b/configs/mx6slevk_spinor_defconfig
@@ -35,6 +35,7 @@
 CONFIG_DM_I2C=y
 CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000
@@ -50,6 +51,7 @@
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_DM_THERMAL=y
 CONFIG_USB=y
diff --git a/configs/mx6slevk_spl_defconfig b/configs/mx6slevk_spl_defconfig
index 22bd5c3..46a5d2c 100644
--- a/configs/mx6slevk_spl_defconfig
+++ b/configs/mx6slevk_spl_defconfig
@@ -44,6 +44,7 @@
 CONFIG_DM_I2C=y
 CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000
@@ -59,6 +60,7 @@
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_DM_THERMAL=y
 CONFIG_USB=y