bootconfig: Mark boot_config_checksum() static

In fact, this function is only used in this file, so mark it with 'static'.

Link: http://lkml.kernel.org/r/[email protected]

Acked-by: Masami Hiramatsu <[email protected]>
Signed-off-by: Qiujun Huang <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>

init/main.c

@@ -335,7 +335,7 @@ static char * __init xbc_make_cmdline(const char *key)
 	return new_cmdline;
 }
 
-u32 boot_config_checksum(unsigned char *p, u32 size)
+static u32 boot_config_checksum(unsigned char *p, u32 size)
 {
 	u32 ret = 0;