spi: Move DM_SPI_FLASH and SPI_FLASH_DATAFLASH to Kconfig (for ls1021aXXX)

This patch moves the CONFIG_DM_SPI_FLASH and CONFIG_SPI_FLASH_DATAFLASH
to be defined in Kconfig, not in board specific header file
(include/configs/<board>.h).

Before this change the CONFIG_DM_SPI_FLASH was not set in .config (so it
was not possible to use CONFIG_IS_ENABLED(DM_SPI_FLASH) in SPI DM/DTS
converted drivers), but it was set in u-boot.cfg file.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 714c81e..fb1e38d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1456,6 +1456,8 @@
 	select SUPPORT_SPL
 	select SYS_FSL_DDR
 	select FSL_DDR_INTERACTIVE
+	select DM_SPI_FLASH if FSL_DSPI || FSL_QSPI
+	select SPI_FLASH_DATAFLASH if FSL_DSPI || FSL_QSPI
 	imply SCSI
 
 config TARGET_LS1021ATWR
@@ -1469,6 +1471,7 @@
 	select CPU_V7_HAS_VIRT
 	select LS1_DEEP_SLEEP
 	select SUPPORT_SPL
+	select DM_SPI_FLASH if FSL_DSPI || FSL_QSPI
 	imply SCSI
 
 config TARGET_LS1021ATSN
@@ -1493,6 +1496,7 @@
 	select CPU_V7_HAS_NONSEC
 	select CPU_V7_HAS_VIRT
 	select SUPPORT_SPL
+	select DM_SPI_FLASH if FSL_DSPI || FSL_QSPI
 	imply SCSI
 	help
 	  Support for Freescale LS1021AIOT platform.
@@ -1945,5 +1949,3 @@
 	default "arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds" if (ARCH_MX23 || ARCH_MX28) && !SPL_FRAMEWORK
 	default "arch/arm/cpu/arm1136/u-boot-spl.lds" if CPU_ARM1136
 	default "arch/arm/cpu/armv8/u-boot-spl.lds" if ARM64
-
-