ARM: zynq: Remove sparse warnings

Warnings:
board/xilinx/zynq/board.c:17:13: warning: symbol 'fpga' was not declared. Should it be static?
board/xilinx/zynq/board.c:20:13: warning: symbol 'fpga010' was not declared. Should it be static?
board/xilinx/zynq/board.c:21:13: warning: symbol 'fpga015' was not declared. Should it be static?
board/xilinx/zynq/board.c:22:13: warning: symbol 'fpga020' was not declared. Should it be static?
board/xilinx/zynq/board.c:23:13: warning: symbol 'fpga030' was not declared. Should it be static?
board/xilinx/zynq/board.c:24:13: warning: symbol 'fpga045' was not declared. Should it be static?
board/xilinx/zynq/board.c:25:13: warning: symbol 'fpga100' was not declared. Should it be static?
board/xilinx/zynq/board.c:120:5: warning: symbol 'board_mmc_init' was not declared. Should it be static?

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/xilinx/zynq/board.c

@@ -6,6 +6,8 @@
 
 #include <common.h>
 #include <fdtdec.h>
+#include <fpga.h>
+#include <mmc.h>
 #include <netdev.h>
 #include <zynqpl.h>
 #include <asm/arch/hardware.h>
@@ -14,15 +16,15 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_FPGA
-xilinx_desc fpga;
+static xilinx_desc fpga;
 
 /* It can be done differently */
-xilinx_desc fpga010 = XILINX_XC7Z010_DESC(0x10);
-xilinx_desc fpga015 = XILINX_XC7Z015_DESC(0x15);
-xilinx_desc fpga020 = XILINX_XC7Z020_DESC(0x20);
-xilinx_desc fpga030 = XILINX_XC7Z030_DESC(0x30);
-xilinx_desc fpga045 = XILINX_XC7Z045_DESC(0x45);
-xilinx_desc fpga100 = XILINX_XC7Z100_DESC(0x100);
+static xilinx_desc fpga010 = XILINX_XC7Z010_DESC(0x10);
+static xilinx_desc fpga015 = XILINX_XC7Z015_DESC(0x15);
+static xilinx_desc fpga020 = XILINX_XC7Z020_DESC(0x20);
+static xilinx_desc fpga030 = XILINX_XC7Z030_DESC(0x30);
+static xilinx_desc fpga045 = XILINX_XC7Z045_DESC(0x45);
+static xilinx_desc fpga100 = XILINX_XC7Z100_DESC(0x100);
 #endif
 
 int board_init(void)