am43xx_evm: Add qspiboot target

The ePOS EVM and EVM SK have QSPI as an option to boot.  Add a qspiboot
target that utilizes QSPI for env and so forth as an example of best
practices.  As QSPI is booted from directly we need to chang
CONFIG_SYS_TEXT_BASE.

Note that on ePOS EVM the QSPI and NAND are mutually exclusive choices
we need to handle that elsewhere, once NAND support is also added.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/include/configs/ti_armv7_common.h b/include/configs/ti_armv7_common.h
index 4854272..6982918 100644
--- a/include/configs/ti_armv7_common.h
+++ b/include/configs/ti_armv7_common.h
@@ -196,7 +196,8 @@
  * under common/spl/.  Given our generally common memory map, we set a
  * number of related defaults and sizes here.
  */
-#ifndef CONFIG_NOR_BOOT
+#if !defined(CONFIG_NOR_BOOT) && \
+	!(defined(CONFIG_QSPI_BOOT) && defined(CONFIG_AM43XX))
 #define CONFIG_SPL
 #define CONFIG_SPL_FRAMEWORK
 #define CONFIG_SPL_OS_BOOT