omap4/5: Add support for booting with CH.

Configuration header(CH) is 512 byte header attached to an OMAP
boot image that will help ROM code to initialize clocks, SDRAM
etc and copy U-Boot directly into SDRAM. CH can help us in
by-passing SPL and directly boot U-boot, hence it's an alternative
for SPL. However, we intend to support both CH and SPL for OMAP4/5.

Initialization done through CH is limited and is not equivalent
to that done by SPL. So U-Boot has to distinguish between the
two cases and handle them accordingly. This patch takes care
of doing this.

Signed-off-by: sricharan <r.sricharan@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

include/configs/omap4_common.h

@@ -122,6 +122,9 @@
 /* Flash */
 #define CONFIG_SYS_NO_FLASH	1
 
+/* clocks */
+#define CONFIG_SYS_CLOCKS_ENABLE_ALL
+
 /* commands to include */
 #include <config_cmd_default.h>
 
@@ -278,4 +281,6 @@
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/omap-common/u-boot-spl.lds"
 
+#define CONFIG_SYS_ENABLE_PADS_ALL
+
 #endif /* __CONFIG_OMAP4_COMMON_H */