Memtest86+: Fix non-ANSI C function declarations

Change function declarations with an empty parameter list to (void).

Change-Id: Ib1106ed6b52c4038125ff5512f5aef3ccb809e89
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14177
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Ben Gardner <gardner.ben@gmail.com>
diff --git a/cpuid.c b/cpuid.c
index 088d8f3..250a7aa 100644
--- a/cpuid.c
+++ b/cpuid.c
@@ -9,7 +9,7 @@
 
 struct cpu_ident cpu_id;
 
-void get_cpuid()
+void get_cpuid(void)
 {
 	unsigned int *v, dummy[3];
 	char *p, *q;