boot: Update extlinux pxe_getfile_func() to include type

Add a file-type parameter to this function and update all users. Add a
proper comment to the function which we are here.

This will allow tracking of the file types loaded by the extlinux
bootmeth.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/boot/pxe_utils.c b/boot/pxe_utils.c
index 8c9c7f8..82f217a 100644
--- a/boot/pxe_utils.c
+++ b/boot/pxe_utils.c
@@ -6,6 +6,7 @@
 
 #define LOG_CATEGORY	LOGC_BOOT
 
+#include <bootflow.h>
 #include <command.h>
 #include <dm.h>
 #include <env.h>
@@ -97,7 +98,8 @@
  * Returns 1 for success, or < 0 on error
  */
 static int get_relfile(struct pxe_context *ctx, const char *file_path,
-		       unsigned long file_addr, ulong *filesizep)
+		       unsigned long file_addr, enum bootflow_img_t type,
+		       ulong *filesizep)
 {
 	size_t path_len;
 	char relfile[MAX_TFTP_PATH_LEN + 1];
@@ -124,7 +126,7 @@
 
 	sprintf(addr_buf, "%lx", file_addr);
 
-	ret = ctx->getfile(ctx, relfile, addr_buf, &size);
+	ret = ctx->getfile(ctx, relfile, addr_buf, type, &size);
 	if (ret < 0)
 		return log_msg_ret("get", ret);
 	if (filesizep)
@@ -140,7 +142,8 @@
 	int err;
 	char *buf;
 
-	err = get_relfile(ctx, file_path, file_addr, &size);
+	err = get_relfile(ctx, file_path, file_addr, BFI_EXTLINUX_CFG,
+			  &size);
 	if (err < 0)
 		return err;
 
@@ -189,13 +192,15 @@
  * @file_path: File path to read (relative to the PXE file)
  * @envaddr_name: Name of environment variable which contains the address to
  *	load to
+ * @type: File type
  * @filesizep: Returns the file size in bytes
  * Returns 1 on success, -ENOENT if @envaddr_name does not exist as an
  *	environment variable, -EINVAL if its format is not valid hex, or other
  *	value < 0 on other error
  */
 static int get_relfile_envaddr(struct pxe_context *ctx, const char *file_path,
-			       const char *envaddr_name, ulong *filesizep)
+			       const char *envaddr_name,
+			       enum bootflow_img_t type, ulong *filesizep)
 {
 	unsigned long file_addr;
 	char *envaddr;
@@ -207,7 +212,7 @@
 	if (strict_strtoul(envaddr, 16, &file_addr) < 0)
 		return -EINVAL;
 
-	return get_relfile(ctx, file_path, file_addr, filesizep);
+	return get_relfile(ctx, file_path, file_addr, type, filesizep);
 }
 
 /**
@@ -395,6 +400,7 @@
 
 		/* Load overlay file */
 		err = get_relfile_envaddr(ctx, overlayfile, "fdtoverlay_addr_r",
+					  (enum bootflow_img_t)IH_TYPE_FLATDT,
 					  NULL);
 		if (err < 0) {
 			printf("Failed loading overlay %s\n", overlayfile);
@@ -480,7 +486,8 @@
 	}
 
 	if (get_relfile_envaddr(ctx, label->kernel, "kernel_addr_r",
-				NULL) < 0) {
+				(enum bootflow_img_t)IH_TYPE_KERNEL, NULL)
+				< 0) {
 		printf("Skipping %s for failure retrieving kernel\n",
 		       label->name);
 		return 1;
@@ -506,6 +513,7 @@
 	} else if (label->initrd) {
 		ulong size;
 		if (get_relfile_envaddr(ctx, label->initrd, "ramdisk_addr_r",
+					(enum bootflow_img_t)IH_TYPE_RAMDISK,
 					&size) < 0) {
 			printf("Skipping %s for failure retrieving initrd\n",
 			       label->name);
@@ -651,7 +659,8 @@
 
 		if (fdtfile) {
 			int err = get_relfile_envaddr(ctx, fdtfile,
-						      "fdt_addr_r", NULL);
+				"fdt_addr_r",
+				 (enum bootflow_img_t)IH_TYPE_FLATDT, NULL);
 
 			free(fdtfilefree);
 			if (err < 0) {
@@ -1538,7 +1547,8 @@
 	if (IS_ENABLED(CONFIG_CMD_BMP)) {
 		/* display BMP if available */
 		if (cfg->bmp) {
-			if (get_relfile(ctx, cfg->bmp, image_load_addr, NULL)) {
+			if (get_relfile(ctx, cfg->bmp, image_load_addr,
+					BFI_LOGO, NULL)) {
 #if defined(CONFIG_VIDEO)
 				struct udevice *dev;