powerpc/85xx: Declare fsl_ddr_set_memctl_regs in <asm/fsl_ddr_sdram.h>

Remove declerations of fsl_ddr_set_memctl_regs in board files with and
place it into a common header.

Based on patch from Poonam Aggrwal.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/include/asm/fsl_ddr_sdram.h

@@ -271,6 +271,8 @@ typedef struct memctl_options_s {
 
 extern phys_size_t fsl_ddr_sdram(void);
 extern int fsl_use_spd(void);
+extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
+					unsigned int ctrl_num);
 
 /*
  * The 85xx boards have a common prototype for fixed_sdram so put the

board/freescale/corenet_ds/ddr.c

@@ -16,9 +16,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
-				   unsigned int ctrl_num);
-
 
 /*
  * Fixed sdram init -- doesn't use serial presence detect.

board/freescale/p1_p2_rdb/ddr.c

@@ -30,9 +30,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
-				   unsigned int ctrl_num);
-
 #define CONFIG_SYS_DDR_CS0_BNDS		0x0000003F
 #define CONFIG_SYS_DDR_CS0_CONFIG	0x80014202
 #define CONFIG_SYS_DDR_CS0_CONFIG_2	0x00000000