uboot-mediatek: sync mtk-openwrt open source u-boot patches

Synchronize the latest MTK u-boot patches[1]. Some patches have
been amended since last synchronization.

Changes:
* Minor NMBM layer fixes and improvements.
* A new bootmenu shortkey implementation.
* New SPI flash support for en25qx128.

[1] https://github.com/mtk-openwrt/u-boot/tree/mtksoc-20230719

Signed-off-by: Shiji Yang <yangshiji66@qq.com>

package/boot/uboot-mediatek/patches/211-cmd-bootmenu-custom-title.patch

@@ -1,6 +1,6 @@
 --- a/cmd/bootmenu.c
 +++ b/cmd/bootmenu.c
-@@ -465,7 +465,11 @@ static void menu_display_statusline(stru
+@@ -463,7 +463,11 @@ static void menu_display_statusline(stru
  	printf(ANSI_CURSOR_POSITION, 1, 1);
  	puts(ANSI_CLEAR_LINE);
  	printf(ANSI_CURSOR_POSITION, 2, 3);
@@ -13,7 +13,7 @@
  	puts(ANSI_CLEAR_LINE_TO_END);
  	printf(ANSI_CURSOR_POSITION, 3, 1);
  	puts(ANSI_CLEAR_LINE);
-@@ -550,6 +554,7 @@ static enum bootmenu_ret bootmenu_show(i
+@@ -548,6 +552,7 @@ static enum bootmenu_ret bootmenu_show(i
  		return BOOTMENU_RET_FAIL;
  	}
  
@@ -23,11 +23,11 @@
  			goto cleanup;
 --- a/include/menu.h
 +++ b/include/menu.h
-@@ -47,6 +47,7 @@ struct bootmenu_data {
+@@ -45,6 +45,7 @@ struct bootmenu_data {
  	int last_active;		/* last active menu entry */
  	int count;			/* total count of menu entries */
  	struct bootmenu_entry *first;	/* first menu entry */
 +	char *mtitle;			/* custom menu title */
- 	bool last_choiced;
  };
  
+ /** enum bootmenu_key - keys that can be returned by the bootmenu */