MPC83xx: add define for global half-strength enable (HSE)

Signed-off-by: NAndre Schwarz <andre.schwarz@matrix-vision.de>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>

include/mpc83xx.h

@@ -1000,6 +1000,7 @@
 #define SDRAM_CFG_8_BE			0x00040000
 #define SDRAM_CFG_NCAP			0x00020000
 #define SDRAM_CFG_2T_EN			0x00008000
+#define SDRAM_CFG_HSE			0x00000008
 #define SDRAM_CFG_BI			0x00000001
 
 /* DDR_SDRAM_MODE - DDR SDRAM Mode Register