MSCC: Add support for Jaguar2 SOC family

As the Ocelot and Luton SoCs, this family of SoCs are found
in Microsemi Switches solution.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
diff --git a/arch/mips/mach-mscc/dram.c b/arch/mips/mach-mscc/dram.c
index 309007c..8002e07 100644
--- a/arch/mips/mach-mscc/dram.c
+++ b/arch/mips/mach-mscc/dram.c
@@ -19,7 +19,7 @@
 
 	ret = hal_vcoreiii_train_bytelane(0);
 
-#ifdef CONFIG_SOC_OCELOT
+#if defined(CONFIG_SOC_OCELOT) || defined(CONFIG_SOC_JR2)
 	if (ret)
 		return ret;
 	ret = hal_vcoreiii_train_bytelane(1);