arch/x86/car.ld: Rename suffix _start/_end

This is more in line with how linker symbol for regions are defined.

Change-Id: I0bd7ae59a27909ed0fd38e6f7193816cb57e76af
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36695
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/cpu/intel/car/core2/cache_as_ram.S

@@ -173,7 +173,7 @@ addrsize_set_high:
 	movl	%eax, %cr0
 
 	/* Setup the stack. */
-	mov	$_car_stack_end, %esp
+	mov	$_ecar_stack, %esp
 
 	/* Need to align stack to 16 bytes at call instruction. Account for
 	the pushes below. */

src/cpu/intel/car/non-evict/cache_as_ram.S

@@ -215,7 +215,7 @@ end_microcode_update:
 	movl	%eax, %cr0
 
 	/* Setup the stack. */
-	mov	$_car_stack_end, %esp
+	mov	$_ecar_stack, %esp
 
 	/* Need to align stack to 16 bytes at call instruction. Account for
 	the pushes below. */

src/cpu/intel/car/p3/cache_as_ram.S

@@ -161,7 +161,7 @@ addrsize_set_high:
 	movl	%eax, %cr0
 
 	/* Setup the stack. */
-	mov	$_car_stack_end, %esp
+	mov	$_ecar_stack, %esp
 
 	/* Need to align stack to 16 bytes at call instruction. Account for
 	the pushes below. */

src/cpu/intel/car/p4-netburst/cache_as_ram.S

@@ -376,7 +376,7 @@ fill_cache:
 	rep	stosl
 
 	/* Setup the stack. */
-	mov	$_car_stack_end, %esp
+	mov	$_ecar_stack, %esp
 
 	/* Need to align stack to 16 bytes at call instruction. Account for
 	the pushes below. */

src/cpu/intel/car/romstage.c

@@ -46,7 +46,7 @@ static void romstage_main(unsigned long bist)
 		printk(BIOS_DEBUG, "Romstage stack size limited to 0x%x!\n",
 			size);
 
-	stack_base = (u32 *) (_car_stack_end - size);
+	stack_base = (u32 *) (_ecar_stack - size);
 
 	for (i = 0; i < num_guards; i++)
 		stack_base[i] = stack_guard;