fsl_sec : Change accessor function to take care of endianness

SEC registers can be of type Little Endian or big Endian depending upon
Freescale SoC. Here SoC defines the register type of SEC IP.

So update acessor functions with common SEC acessor functions to take care
both type of endianness.

Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/README b/README
index 46def00..19abe20 100644
--- a/README
+++ b/README
@@ -544,6 +544,12 @@
 		CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS
 		Number of controllers used for other than main memory.
 
+		CONFIG_SYS_FSL_SEC_BE
+		Defines the SEC controller register space as Big Endian
+
+		CONFIG_SYS_FSL_SEC_LE
+		Defines the SEC controller register space as Little Endian
+
 - Intel Monahans options:
 		CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO