[SPARC]: Kill CHILD_MAX.

It's definition is wrong (-1 means "no limit" not 999),
only the Sparc SunOS/Solaris compat code uses it, so
let's just kill it off completely from limits.h and
all referencing code.

Noticed by Ulrich Drepper.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/solaris/misc.c b/arch/sparc64/solaris/misc.c
index 302efbc..3ab4677 100644
--- a/arch/sparc64/solaris/misc.c
+++ b/arch/sparc64/solaris/misc.c
@@ -353,7 +353,7 @@
 {
 	switch (id) {
 	case SOLARIS_CONFIG_NGROUPS:	return NGROUPS_MAX;
-	case SOLARIS_CONFIG_CHILD_MAX:	return CHILD_MAX;
+	case SOLARIS_CONFIG_CHILD_MAX:	return -1; /* no limit */
 	case SOLARIS_CONFIG_OPEN_FILES:	return OPEN_MAX;
 	case SOLARIS_CONFIG_POSIX_VER:	return 199309;
 	case SOLARIS_CONFIG_PAGESIZE:	return PAGE_SIZE;