configs: Move CONFIG_SPI_FLASH into defconfigs

Completely move CONFIG_SPI_FLASH from remaining board header files to
defconfigs

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com> #zynq-microzed
diff --git a/configs/ls2080aqds_sdcard_defconfig b/configs/ls2080aqds_sdcard_defconfig
index d6ca289..fff54b1 100644
--- a/configs/ls2080aqds_sdcard_defconfig
+++ b/configs/ls2080aqds_sdcard_defconfig
@@ -43,6 +43,7 @@
 CONFIG_DM_MMC=y
 CONFIG_FSL_ESDHC=y
 CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_GIGE=y
 CONFIG_E1000=y