arm64: zynqmp: Do not use any EXTRA_ENV_SETTINGS

No reason to save additional variables to environment for mini
configurations.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/include/configs/xilinx_zynqmp_mini.h b/include/configs/xilinx_zynqmp_mini.h
index 9e49641..7138851 100644
--- a/include/configs/xilinx_zynqmp_mini.h
+++ b/include/configs/xilinx_zynqmp_mini.h
@@ -12,6 +12,8 @@
 
 #define CONFIG_SYS_MEMTEST_SCRATCH     0xfffc0000
 
+#define CONFIG_EXTRA_ENV_SETTINGS
+
 #include <configs/xilinx_zynqmp.h>
 
 /* Undef unneeded configs */