arm: mvebu: clearfog: support 512MB memory size from tlv eeprom

Handle 2GBit memory size value "2" from tlv eeprom on ddr
initialisation, to support SoMs with 512MB ddr memory.

Signed-off-by: Josua Mayer <josua@solid-run.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/board/solidrun/clearfog/clearfog.c b/board/solidrun/clearfog/clearfog.c
index 4f4532b..6fa2fe5 100644
--- a/board/solidrun/clearfog/clearfog.c
+++ b/board/solidrun/clearfog/clearfog.c
@@ -159,6 +159,9 @@
 	cf_read_tlv_data();
 
 	switch (cf_tlv_data.ram_size) {
+	case 2:
+		ifp->memory_size = MV_DDR_DIE_CAP_2GBIT;
+		break;
 	case 4:
 	default:
 		ifp->memory_size = MV_DDR_DIE_CAP_4GBIT;