arm64: zynqmp: xil_io.h: declare functions as static

Fixes sparse warnings when building zynqmp defconfigs:
  ./board/xilinx/zynqmp/xil_io.h:12:6: warning: symbol 'Xil_Out32' was not declared. Should it be static?
  ./board/xilinx/zynqmp/xil_io.h:17:5: warning: symbol 'Xil_In32' was not declared. Should it be static?
  ./board/xilinx/zynqmp/xil_io.h:22:6: warning: symbol 'usleep' was not declared. Should it be static?

Also add __maybe_unused to usleep() since it is not used by minimized
psu_init_gpl.c files, so it would warn as "defined but not used".

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/board/xilinx/zynqmp/xil_io.h b/board/xilinx/zynqmp/xil_io.h
index c476c902eb..1c1bf32ada 100644
--- a/board/xilinx/zynqmp/xil_io.h
+++ b/board/xilinx/zynqmp/xil_io.h
@@ -9,17 +9,17 @@
 
 #define xil_printf(...)
 
-void Xil_Out32(unsigned long addr, unsigned long val)
+static void Xil_Out32(unsigned long addr, unsigned long val)
 {
 	writel(val, addr);
 }
 
-int Xil_In32(unsigned long addr)
+static int Xil_In32(unsigned long addr)
 {
 	return readl(addr);
 }
 
-void usleep(u32 sleep)
+static void __maybe_unused usleep(u32 sleep)
 {
 	udelay(sleep);
 }