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/sama5d2_icp_mmc_defconfig b/configs/sama5d2_icp_mmc_defconfig
index 6d4d199..1fafb76 100644
--- a/configs/sama5d2_icp_mmc_defconfig
+++ b/configs/sama5d2_icp_mmc_defconfig
@@ -23,6 +23,7 @@
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 # CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_SPL_TEXT_BASE=0x200000
 CONFIG_SPL_SEPARATE_BSS=y
 CONFIG_SPL_DISPLAY_PRINT=y
 # CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set