configs: move CONFIG_SPL_TEXT_BASE to Kconfig

Moved CONFIG_SPL_TEXT_BASE to common/spl/Kconfig and migrate existing
values.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
[trini: Re-run migration]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/socfpga_arria10_defconfig b/configs/socfpga_arria10_defconfig
index 38db5f6..47fe1d9 100644
--- a/configs/socfpga_arria10_defconfig
+++ b/configs/socfpga_arria10_defconfig
@@ -9,6 +9,7 @@
 CONFIG_DEFAULT_FDT_FILE="socfpga_arria10_socdk_sdmmc.dtb"
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOUNCE_BUFFER=y
+CONFIG_SPL_TEXT_BASE=0xFFE00000
 CONFIG_SPL_FPGA_SUPPORT=y
 CONFIG_SPL_SPI_LOAD=y
 CONFIG_CMD_ASKENV=y