sparc64: Fix crashes in jbusmc_print_dimm()

Return was missing for the case where there is no dimm
info match.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/chmc.c

diff --git a/arch/sparc/kernel/chmc.c b/arch/sparc/kernel/chmc.c
index 3b9f4d6..e1a9598 100644
--- a/arch/sparc/kernel/chmc.c
+++ b/arch/sparc/kernel/chmc.c
@@ -306,6 +306,7 @@
 		buf[1] = '?';
 		buf[2] = '?';
 		buf[3] = '\0';
+		return 0;
 	}
 	p = dp->controller;
 	prop = &p->layout;