arch: Rename xxx_getsp to up_getsp

All modern desgin support stack pointer and it's also an
important information, so let's standardize this interface.

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

arch/z80/src/common/z80_assert.c

@@ -162,7 +162,7 @@ void up_assert(const char *filename, int lineno)
 #ifdef CONFIG_BOARD_CRASHDUMP
   /* Execute board-specific crash dump logic */
 
-  board_crashdump(z80_getsp(), running_task(), filename, lineno);
+  board_crashdump(up_getsp(), running_task(), filename, lineno);
 #endif
 
   _up_assert();

arch/z80/src/common/z80_internal.h

@@ -128,7 +128,7 @@ int up_multicastfilter(FAR struct net_driver_s *dev, FAR uint8_t *mac,
 
 /* Return the current value of the stack pointer (used in stack dump logic) */
 
-uintptr_t z80_getsp(void);
+uintptr_t up_getsp(void);
 
 /* Dump stack and registers */
 

arch/z80/src/common/z80_stackdump.c

@@ -44,7 +44,7 @@
 void up_stackdump(void)
 {
   FAR struct tcb_s *rtcb = this_task();
-  uintptr_t sp = z80_getsp();
+  uintptr_t sp = up_getsp();
   uintptr_t stack_base = (uintptr_t)rtcb->stack_base_ptr;
   uintptr_t stack_size = (uintptr_t)rtcb->adj_stack_size;
   uintptr_t stack;

arch/z80/src/ez80/ez80_getsp.asm

@@ -22,7 +22,7 @@
 ; Global Symbols Exported
 ;**************************************************************************
 
-	xdef	_z80_getsp
+	xdef	_up_getsp
 
 ;**************************************************************************
 ; Code
@@ -32,14 +32,14 @@
 	.assume ADL=1
 
 ;**************************************************************************
-;* Name: _z80_getsp
+;* Name: _up_getsp
 ;*
 ;* Description:
 ;*   Return the current value of the stack pointer
 ;*
 ;**************************************************************************
 
-_z80_getsp:
+_up_getsp:
 	ld		hl, 0			; Initialize HL to zero
 	add		hl, sp			; Add the stack pointer to HL
 	ret						; Return stack pointer in HL