powerpc: Switch to using CONFIG_SYS_INIT_SP_OFFSET from CONFIG_SYS_GBL_DATA_OFFSET

In the places where PowerPC references CONFIG_SYS_GBL_DATA_OFFSET it
does so as (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET).  And
it defines CONFIG_SYS_GBL_DATA_OFFSET in the same manner that other
architectures define CONFIG_SYS_INIT_SP_OFFSET. Other architectures
define CONFIG_SYS_INIT_SP_ADDR as (CONFIG_SYS_INIT_RAM_ADDR +
CONFIG_SYS_INIT_SP_OFFSET) typically.  Rename things within PowerPC for
consistency with other architectures.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/powerpc/cpu/mpc83xx/cpu_init.c b/arch/powerpc/cpu/mpc83xx/cpu_init.c
index e6dcb8a..b2b259b 100644
--- a/arch/powerpc/cpu/mpc83xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc83xx/cpu_init.c
@@ -138,7 +138,7 @@
 		0;
 
 	/* Pointer is writable since we allocated a register for it */
-	gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
+	gd = (gd_t *)CONFIG_SYS_INIT_SP_ADDR;
 
 	/* global data region was cleared in start.S */
 
diff --git a/arch/powerpc/cpu/mpc83xx/spl_minimal.c b/arch/powerpc/cpu/mpc83xx/spl_minimal.c
index 11b1e61..6d4655f 100644
--- a/arch/powerpc/cpu/mpc83xx/spl_minimal.c
+++ b/arch/powerpc/cpu/mpc83xx/spl_minimal.c
@@ -25,7 +25,7 @@
 void cpu_init_f (volatile immap_t * im)
 {
 	/* Pointer is writable since we allocated a register for it */
-	gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
+	gd = (gd_t *)CONFIG_SYS_INIT_SP_ADDR;
 
 	/* global data region was cleared in start.S */
 
diff --git a/arch/powerpc/cpu/mpc83xx/start.S b/arch/powerpc/cpu/mpc83xx/start.S
index 7a01b16..b136456 100644
--- a/arch/powerpc/cpu/mpc83xx/start.S
+++ b/arch/powerpc/cpu/mpc83xx/start.S
@@ -229,8 +229,8 @@
 	/* set up the stack pointer in our newly created
 	 * cache-ram; use r3 to keep the new SP for now to
 	 * avoid overiding the SP it uselessly */
-	lis	r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
-	ori	r3, r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
+	lis	r3, CONFIG_SYS_INIT_SP_ADDR@h
+	ori	r3, r3, CONFIG_SYS_INIT_SP_ADDR@l
 
 	/* r4 = end of GD area */
 	addi r4, r3, GENERATED_GBL_DATA_SIZE
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c
index 584454e..612941f 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c
@@ -94,7 +94,7 @@
 #endif
 
 	/* Pointer is writable since we allocated a register for it */
-	gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
+	gd = (gd_t *)CONFIG_SYS_INIT_SP_ADDR;
 
 	/* gd area was zeroed during startup */
 
diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S
index 48f06f5..649afa0 100644
--- a/arch/powerpc/cpu/mpc85xx/start.S
+++ b/arch/powerpc/cpu/mpc85xx/start.S
@@ -1160,8 +1160,8 @@
 	bne	1b
 
 #if CONFIG_VAL(SYS_MALLOC_F_LEN)
-	lis	r4,(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
-	ori	r4,r4,(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
+	lis	r4,CONFIG_SYS_INIT_SP_ADDR@h
+	ori	r4,r4,CONFIG_SYS_INIT_SP_ADDR@l
 
 	addi	r3,r3,16	/* Pre-relocation malloc area */
 	stw	r3,GD_MALLOC_BASE(r4)