x86: Rename board_final_cleanup() to board_final_init()

This function sounds like something that is called when U-Boot is about to
jump to Linux. In fact it is an init function.

Rename it to reduce confusion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index 9ef797b..98ed66e 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -179,10 +179,10 @@
 
 #if !defined(CONFIG_SYS_COREBOOT) && !defined(CONFIG_EFI_STUB)
 /*
- * Implement a weak default function for boards that optionally
- * need to clean up the system before jumping to the kernel.
+ * Implement a weak default function for boards that need to do some final init
+ * before the system is ready.
  */
-__weak void board_final_cleanup(void)
+__weak void board_final_init(void)
 {
 }
 
@@ -190,7 +190,7 @@
 {
 	struct acpi_fadt __maybe_unused *fadt;
 
-	board_final_cleanup();
+	board_final_init();
 
 	if (IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)) {
 		fadt = acpi_find_fadt();