Kconfig: Adds SYS_TEXT_BASE config option for Keystone2

This patch makes SYS_TEXT_BASE a config option for Keystone2
so that it can be used to load u-boot at different addresses
on secure and non-secure Keystone2 devices.

Signed-off-by: Madan Srinivas <madans@ti.com>
Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/configs/k2hk_evm_defconfig b/configs/k2hk_evm_defconfig
index b22086d..12b8047 100644
--- a/configs/k2hk_evm_defconfig
+++ b/configs/k2hk_evm_defconfig
@@ -7,6 +7,7 @@
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
 CONFIG_SPL_SPI_SUPPORT=y
 CONFIG_SPL_POWER_SUPPORT=y
+CONFIG_SYS_TEXT_BASE=0x0c000000
 CONFIG_DEFAULT_DEVICE_TREE="keystone-k2hk-evm"
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y