x86: qemu: Add a text base for 64-bit U-Boot

Set up the 64-bit U-Boot text base if building for that target.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

board/emulation/qemu-x86/Kconfig

@@ -13,8 +13,8 @@ config SYS_CONFIG_NAME
 	default "qemu-x86"
 
 config SYS_TEXT_BASE
-	default 0xfff00000 if !EFI_STUB
-	default 0x01110000 if EFI_STUB
+	default 0xfff00000 if !EFI_STUB && !SUPPORT_SPL
+	default 0x01110000 if EFI_STUB || SUPPORT_SPL
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y