Migrate CUSTOM_SYS_INIT_SP_ADDR to Kconfig using system-constants.h

- Make all users of CUSTOM_SYS_INIT_SP_ADDR reference SYS_INIT_SP_ADDR
- Introduce HAS_CUSTOM_SYS_INIT_SP_ADDR to allow for setting the stack
  pointer directly, otherwise we use the common calculation.
- On some platforms that were using the standard calculation but did not
  set CONFIG_SYS_INIT_RAM_SIZE / CONFIG_SYS_INIT_RAM_ADDR, set them.
- On a small number of platforms that were not subtracting
  GENERATED_GBL_DATA_SIZE do so now via the standard calculation.
- CONFIG_SYS_INIT_SP_OFFSET is now widely unused, so remove it from most
  board config header files.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 612a2d5..fe6b447 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -9,6 +9,7 @@
 #include <asm-offsets.h>
 #include <linux/linkage.h>
 #include <asm/assembler.h>
+#include <system-constants.h>
 
 /*
  * This file handles the target-independent stages of the U-Boot
@@ -104,7 +105,7 @@
 #elif defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
 	ldr	r0, =(CONFIG_SPL_STACK)
 #else
-	ldr	r0, =(CONFIG_SYS_INIT_SP_ADDR)
+	ldr	r0, =(SYS_INIT_SP_ADDR)
 #endif
 	bic	r0, r0, #7	/* 8-byte alignment for ABI compliance */
 	mov	sp, r0
diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 84c04bd..dcc924d 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -13,6 +13,7 @@
 #include <asm-offsets.h>
 #include <asm/macro.h>
 #include <linux/linkage.h>
+#include <system-constants.h>
 
 /*
  * This file handles the target-independent stages of the U-Boot
@@ -81,7 +82,7 @@
 #endif
 	add	x0, x0, #CONFIG_SYS_INIT_SP_BSS_OFFSET
 #else
-	ldr	x0, =(CONFIG_SYS_INIT_SP_ADDR)
+	ldr	x0, =(SYS_INIT_SP_ADDR)
 #endif
 	bic	sp, x0, #0xf	/* 16-byte alignment for ABI compliance */
 	mov	x0, sp
diff --git a/arch/arm/lib/vectors_m.S b/arch/arm/lib/vectors_m.S
index 7d2d55c..8d88cc7 100644
--- a/arch/arm/lib/vectors_m.S
+++ b/arch/arm/lib/vectors_m.S
@@ -7,6 +7,7 @@
 #include <config.h>
 #include <asm/assembler.h>
 #include <linux/linkage.h>
+#include <system-constants.h>
 
 .type __hard_fault_entry, %function
 __hard_fault_entry:
@@ -35,7 +36,7 @@
 
    .section  .vectors
 ENTRY(_start)
-	.long	CONFIG_SYS_INIT_SP_ADDR		@ 0 - Reset stack pointer
+	.long	SYS_INIT_SP_ADDR		@ 0 - Reset stack pointer
 	.long	reset				@ 1 - Reset
 	.long	__invalid_entry			@ 2 - NMI
 	.long	__hard_fault_entry		@ 3 - HardFault