ARM: embestmx6boards: convert the mars/riot boards to DM SPI

Enable DM_SPI and DM_SPI_FLASH on the mars/riot boards.
Signed-off-by: NPeter Robinson <pbrobinson@gmail.com>
Cc: "Eric Bénard" <eric@eukrea.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>

configs/marsboard_defconfig

@@ -34,6 +34,7 @@ CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000
@@ -45,6 +46,7 @@ CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_MXC_UART=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_DM_THERMAL=y
 CONFIG_IMX_THERMAL=y

configs/riotboard_defconfig

@@ -46,6 +46,7 @@ CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000
@@ -57,6 +58,7 @@ CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_MXC_UART=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_DM_THERMAL=y
 CONFIG_IMX_THERMAL=y