pm9263: enable cache command

Signed-off-by: Asen Dimov <dimov@ronetix.at>
diff --git a/include/configs/pm9263.h b/include/configs/pm9263.h
index c9e7489..96e12f2 100644
--- a/include/configs/pm9263.h
+++ b/include/configs/pm9263.h
@@ -214,6 +214,7 @@
 #undef CONFIG_CMD_LOADS
 #undef CONFIG_CMD_IMLS
 
+#define CONFIG_CMD_CACHE
 #define CONFIG_CMD_PING		1
 #define CONFIG_CMD_DHCP		1
 #define CONFIG_CMD_NAND		1