powerpc/85xx: Add support for 2nd USB controller on p1_p2_rdb

Second USB controller only works for SPI and SD boot because of pin muxing

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
diff --git a/include/configs/P1_P2_RDB.h b/include/configs/P1_P2_RDB.h
index 5907856..449329a 100644
--- a/include/configs/P1_P2_RDB.h
+++ b/include/configs/P1_P2_RDB.h
@@ -244,6 +244,7 @@
 #define CONFIG_SYS_FLASH_AMD_CHECK_DQ7
 
 #define CONFIG_BOARD_EARLY_INIT_R	/* call board_early_init_r function */
+#define CONFIG_MISC_INIT_R
 #define CONFIG_HWCONFIG
 
 #define CONFIG_SYS_INIT_RAM_LOCK	1