spi: Move SPI drivers to defconfig

There are already Kconfig options for SPI drivers, but we
have not moved them from config.h to defconfig files. This
commit does this in a batch.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/T1024QDS_DDR4_defconfig b/configs/T1024QDS_DDR4_defconfig
index c8dad93..1ac9c9d 100644
--- a/configs/T1024QDS_DDR4_defconfig
+++ b/configs/T1024QDS_DDR4_defconfig
@@ -4,3 +4,4 @@
 CONFIG_SYS_EXTRA_OPTIONS="PPC_T1024,SYS_FSL_DDR4"
 CONFIG_SPI_FLASH=y
 CONFIG_SYS_NS16550=y
+CONFIG_FSL_ESPI=y