[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>

arch/sparc/kernel/sys_sunos.c

@@ -894,7 +894,7 @@ asmlinkage long sunos_sysconf (int name)
 		ret = ARG_MAX;
 		break;
 	case _SC_CHILD_MAX:
-		ret = CHILD_MAX;
+		ret = -1; /* no limit */
 		break;
 	case _SC_CLK_TCK:
 		ret = HZ;

arch/sparc64/kernel/sys_sunos32.c

@@ -854,7 +854,7 @@ asmlinkage s32 sunos_sysconf (int name)
 		ret = ARG_MAX;
 		break;
 	case _SC_CHILD_MAX:
-		ret = CHILD_MAX;
+		ret = -1; /* no limit */
 		break;
 	case _SC_CLK_TCK:
 		ret = HZ;

arch/sparc64/solaris/misc.c

@@ -353,7 +353,7 @@ asmlinkage int solaris_sysconf(int id)
 {
 	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;