arm: imx6: tqma6: implement IMX_CONFIG with Kconfig

Now that we have the Kconfig based CPU type selection,
use this to fill the IMX_CONFIG automatically
Signed-off-by: NMarkus Niebel <Markus.Niebel@tq-group.com>

board/tqc/tqma6/Kconfig

@@ -33,4 +33,8 @@ config TQMA6S
 
 endchoice
 
+config IMX_CONFIG
+	default "board/tqc/tqma6/tqma6q.cfg" if TQMA6Q
+	default "board/tqc/tqma6/tqma6s.cfg" if TQMA6S
+
 endif

configs/tqma6q_mba6_mmc_defconfig

 CONFIG_ARM=y
 CONFIG_ARCH_MX6=y
 CONFIG_TARGET_TQMA6=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6q.cfg,MBA6,TQMA6X_MMC_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="MBA6,TQMA6X_MMC_BOOT"
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_NET=y

configs/tqma6q_mba6_spi_defconfig

 CONFIG_ARM=y
 CONFIG_ARCH_MX6=y
 CONFIG_TARGET_TQMA6=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6q.cfg,MBA6,TQMA6X_SPI_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="MBA6,TQMA6X_SPI_BOOT"
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_NET=y

configs/tqma6s_mba6_mmc_defconfig

@@ -2,6 +2,6 @@ CONFIG_ARM=y
 CONFIG_ARCH_MX6=y
 CONFIG_TARGET_TQMA6=y
 CONFIG_TQMA6S=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6s.cfg,MBA6,TQMA6X_MMC_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="MBA6,TQMA6X_MMC_BOOT"
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_NET=y

configs/tqma6s_mba6_spi_defconfig

@@ -2,6 +2,6 @@ CONFIG_ARM=y
 CONFIG_ARCH_MX6=y
 CONFIG_TARGET_TQMA6=y
 CONFIG_TQMA6S=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6s.cfg,MBA6,TQMA6X_SPI_BOOT"
+CONFIG_SYS_EXTRA_OPTIONS="MBA6,TQMA6X_SPI_BOOT"
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_NET=y