ARM64: zynqmp: Increase environment size to 32K

Increase environment size to 32K as the current default
environment itself is greater than 4K.
Signed-off-by: NSiva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

include/configs/xilinx_zynqmp.h

@@ -133,7 +133,7 @@
 
 /* Do not preserve environment */
 #define CONFIG_ENV_IS_NOWHERE		1
-#define CONFIG_ENV_SIZE			0x1000
+#define CONFIG_ENV_SIZE			0x8000
 
 /* Monitor Command Prompt */
 /* Console I/O Buffer Size */